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Do maternal morbidities change the nutritional composition of human milk? A systematic review.

Introduction

Studies have shown an increased prevalence of diabetes mellitus, hypertension and overweight among women (1-3) over the years.

Concerning diabetes mellitus, a multicenter study conducted between 1999 and 2005 found that 21% of pregnancies were complicated by this disease (2). In Brazil, about 7% of pregnant women have increased gestational glycemia (3). On the other hand, systemic arterial hypertension affects 5% to 10% of pregnancies (4). Regarding overweight, a study carried out in six Brazilian capitals revealed that 28% of women started pregnancy with a weight above the recommended level (1).

Diabetes mellitus and hypertension during pregnancy can cause severe maternal and fetal complications, including deteriorated hypertension, preeclampsia, eclampsia, HELLP syndrome, restricted intrauterine growth, preterm delivery, premature placental abruption, and fetal death, and is one of the primary causes of maternal and perinatal morbimortality (4).

Not unlike this scenario, overweight in pregnancy can also lead to many negative consequences for fetuses (hemorrhages, macrosomia, asphyxia) and women (gestational diabetes mellitus, arterial hypertension, pre-eclampsia, eclampsia and higher weight retention postpartum) (5).

Besides the adverse effects cited, some studies have shown that these chronic diseases may also lead to changes in the nutritional and immunological composition of human milk (6).

Although human milk has been the subject of several studies, the influence of chronic diseases on its nutritional composition has not yet been well elucidated, and results are different, which is why it is still the target of several studies.

As a result, this study aims to identify the effects of the morbidities in question (diabetes mellitus, hypertension, overweight) on the nutritional composition of human milk.

Methods

A systematic review of the literature was performed using a pre-established protocol for searching, selecting and extracting data. The papers were identified by bibliographic search in databases Medline (through PubMed), Lilacs and SciELO (through the Virtual Health Library --BVS Brazil), Scopus and Embase. The description of this systematic review was based on the Preferred Reporting Items for Systematic Reviews (Prisma) (7) guideline (Figure 1).

The association of diabetes mellitus, arterial hypertension and overweight with the nutritional composition of human milk was evaluated through the following descriptors: ("Human Milk") AND ("Diabetes Mellitus" OR "Diabetes Gestational"), ("Human Milk") AND ("Hypertension" OR "Hypertension, Pregnancy-Induced"), ("Human Milk") AND ("Overweight" OR "Obesity").

A search was conducted by two independent researchers and finalized in September 2016. There was no delimitation of publication period or language restriction.

The bibliographic search returned 1,582 papers. Of these, 56 were selected for full-text reading. After extensive selection, only 14 manuscripts were chosen for this work. The others were excluded because they addressed themes that were not of interest to this study. Also, we searched for other papers in the references of the selected papers for this study, but no new manuscripts were found.

The selected papers were compared against the following axes: sample size, mean age of the participants, type of design, maternal morbidity, milk evaluation period, human milk macronutrient analysis method, confounding factors controlled in the analysis and main results observed.

Results

The literature search resulted in 14 papers published between 1987 and 2016. Most studies (n = 5) were conducted in North America (United States), followed by South America (Brazil), Europe (Greece, Finland and the Netherlands), Asia (Lebanon) and Oceania (Australia). Regarding the studied population, age ranged from 17 to 43 years, and three papers did not inform the age group of the participants. The lowest sample consisted of 11 participants, and the most significant sample was 305. Regarding the language, one paper was written in Portuguese and the other in English (Table 1).

Concerning the morbidities, nine papers evaluated diabetes mellitus (8-17), one evaluated hypertension (18) and four overweight (17,19-21). Only one paper evaluated both diabetes and overweight (Table 2).

The most commonly used technique for fat content analysis was gravimetry, followed by calorimetry. For the analysis of the total protein content, the most common procedure was the Kjeldahl method. Only one study analyzed all macronutrients (fat, protein and carbohydrate) and total energy in a single procedure, and for this analysis, the author used the spectrophotometric technique from the Human Milk Analyzer --Miris (Table 2).

Regarding the time of evaluation of human milk, most studies (n = 6) analyzed all phases of milk (colostrum, transitional milk and mature milk), five analyzed only colostrum, two only mature milk and one analyzed the transition and mature milk. The number of milk analyses ranged from 1 to 7 times (Table 2).

Regarding the design used, most (n = 11) used longitudinal observational studies. Information on confounding factors controlled in the analysis was obtained in 12 studies, and the most prevalent were maternal age, gestational age at delivery, type of delivery, tobacco use, parity, and newborn birth weight. Seven papers did not mention exclusion criteria in their methods (Table 3).

Regarding the results of the selected papers, it was observed that nine studies found significant differences in the nutritional composition of the milk of mothers with diabetes mellitus, hypertension, or overweight. A lower concentration of lactose (n = 3) and fat (n = 4) was observed concerning diabetes mellitus and one paper found lower protein value and higher energy value. The other papers selected (n = 2) did not find statistical differences concerning macronutrients (fat, protein, carbohydrate) and total energy. The only study that evaluated the nutritional composition of milk of women with arterial hypertension found that colostrum and mature milk from hypertensive mothers had higher levels of total protein. Regarding overweight, two studies concluded that mothers with obesity had higher fat and energy content, and the other two studies did not find statistical differences (Table 3).

Discussion

In this section, we will discuss and emphasize the main results of the papers selected for this systematic review that have investigated the possible effect of chronic diseases (diabetes mellitus, arterial hypertension or overweight) on the nutritional composition of human milk.

Insulin inadequacy in diabetes mellitus can directly affect the quantity and quality of human milk (15,16). The results of the studies that have investigated this issue are different.

Beusekom et al. (12) did not observe significant differences between glucose, lipid and sodium levels in mature milk of diabetic women. Similarly, Butte et al. (8) found no change in lactose and protein (colostrum, transition and mature milk) among people with diabetes. Authors believe this result may be partly explained because the selected diabetic women have controlled glycemia.

However, Neubauer et al. (11) found lower lactose and higher protein on the second and third day postpartum among people with diabetes. Oliveira et al. (15) also observed lower lactic concentration in the group of diabetic women during the first five days postpartum.

Dritsakou et al. (17) identified higher levels of fat in the milk of diabetic women. This may be partly explained by the abnormal lipid metabolism in diabetics, which is marked by an elevation of lipoprotein lipase and lipolysis. It is worth noting that 50% of diabetics were diagnosed with overweight. However, the authors did not control any possible confounding factors.

Contrary to the findings made explicit above, Jackson et al. (13) and Morceli et al. (16) observed that the amount of fat in the human milk of diabetic women was lower compared to the control group. Despite the results' unanimity, different methods were used to evaluate the nutritional composition of human milk.

Another point worth mentioning is the influence exerted by diabetes mellitus on milk volume. Lactation is marked by two phases--lactogenesis I and II. Phase I begins at the 20th gestation week and may be marked by increased lactose and alpha-lactalbumin. Phase II occurs between 24 and 48 hours postpartum and is marked by increased lactose. Oliveira et al. (15) found an 18-hour delay in the diabetic group to complete the transition from phase I to phase II of lactogenesis, which hindered the establishment of breastfeeding. Similar to the specified, Bitman et al. (9), Arthur et al. (10) and Neubauer et al. (11) observed that the transition from phase I to II of lactogenesis was delayed among diabetic patients with inadequate glycemic control, which led to reduced milk volume from the third to the seventh day postpartum.

The delayed lactogenesis transition in diabetic patients can be partially explained by the action of insulin in the uptake of glucose by the mammary gland. Therefore, the control of glucose in diabetic women is of paramount importance for the achievement of an adequate nutritional composition of human milk as well as for the establishment of breastfeeding (16).

Hypertension is often associated with metabolic, functional, or structural changes in target organs. Also, it is considered one of the diseases that causes more harmful effects to the maternal, fetal and neonatal body (22,23).

When we observed the impact of hypertension on the nutritional composition of human milk, only the study conducted by Massmann et al. (18) was selected. In this study, the authors concluded that colostrum and mature milk from hypertensive mothers had higher levels of total protein. However, the effects of changes in blood pressure on the nutritional composition of human milk are still not fully understood, especially for mothers who have had hypertension-aggravated pregnancies (24).

Regarding the influence of overweight on the nutritional composition of human milk, Bachour et al. (21) found that the nutritional composition of the milk of overweight women had a lower amount of protein. According to the authors, this change may be partially explained by a higher level of oxidative stress among overweight patients.

Fujimori et al. (20) and Dritsakou et al. (17) found higher levels of fat and energy in the milk of overweight women. However, Makela et al. (19) concluded that the milk fat content did not change. It is noteworthy that the milk of these overweight women had a higher amount of saturated fatty acids, reduced amount of omega 3 and a high proportion of omega 6 compared to omega 3.

In short, most studies have shown that the presence of chronic diseases leads to changes in the nutritional composition of human milk. The main results were: 1) three papers that evaluated the nutritional composition of human milk of women with diabetes mellitus found a lower concentration of lactose (10,11,15), and four of fat (9,12,13,16). Concerning hypertension, a higher total protein concentration was found in both colostrum and mature milk (18). In the case of overweight, half of the studies observed a higher fat and energy content in the milk of these mothers (17,20).

The different results among the selected studies can be partly explained by the numerous methodological differences, such as sample size, the method used in the evaluation of human milk, control of confounding factors, nutritional components evaluated, lactation stage (colostrum, and transition and mature milk).

It is noteworthy that while chronic diseases cause nutritional changes in human milk, it is universally agreed that breastfeeding should be strongly encouraged exclusively until the 6th month of life of the newborn and that, from then on, breastfeeding is maintained for two years or more, together with appropriate complementary foods.

It is of the utmost importance that women have continuous nutritional monitoring in prenatal and postpartum care to have effective control of blood glucose, blood pressure and gestational weight gain in order to minimize the impact of diabetes mellitus, arterial hypertension and overweight on the nutritional composition of milk, as well as on the early establishment of breastfeeding.

Collaborations

YNV Amaral participated in the design, methods, analysis, data interpretation and paper drafting. D Marano participated in the design, methods, analysis, data interpretation and final drafting of the paper. LML Silva participated in data analysis and paper drafting. FVM Soares participated in the analysis, data interpretation and final drafting of the paper. MEL Moreira participated in data interpretation and the approval of the version to be published.

DOI: 10.1590/1413-81232018247.18972017

References

(1.) Nucci LB, Duncan BB, Mengue SS, Branchtein L, Schmidt MI, Fleck ET. Assessment of weight gain during pregnancy in general prenatal care services in Brazil. Cad Saude Publica 2001; 17(6):1367-1374.

(2.) Lawrence JM, Contreras R, Chen W, Sacks DA. Trends in the prevalence of preexisting diabetes and gestational diabetes mellitus among a racially/ethnically diverse population of pregnant women, 1999-2005. Diabetes Care 2008; 31(5):899-904.

(3.) Schmidt MI, Duncan BB, Reichelt AJ, Branchtein L, Matos MC, Costa e Forti A, Spichler ER, Pousada JM, Teixeira MM, Yamashita T. Gestational diabetes mellitus diagnosed with a 2-h 75-g oral glucose tolerance test and adverse pregnancy outcomes. Diabetes Care 2001; 24(7):1151-1155.

(4.) Brasil. Ministerio da Saude (MS). Cadernos de Atencao Basica: Atencao ao Pre-natal de Baixo Risco. Brasilia: MS; 2012.

(5.) Barros DCD, Saunders C, Leal MDC. Avaliacao nutricional antropometrica de gestantes brasileiras: uma revisao sistematica. Rev. Bras. Saude Mater. Infant. 2008; 8(4):363-376.

(6.) Ballard O, Morrow AL. Human Milk Composition Nutrients and Bioactive Factors. Pediatr Clin N Am 2013; 60(1):49-74.

(7.) Moher D, Liberati A, Tetzlaff J, Altman DG, The PRISMA Group. Preferred Reporting Items for Systematic Reviews and Meta-Analyses: The PRISMA Statement. PLoS Med 2009; 6(7):e1000097.

(8.) Butte NF, Garza C, Burr R, Goldman AS, Kennedy K, Kitzmiller JL. Milk composition of insulin-dependent diabetic women. J Pediatr Gastroenterol Nutr 1987; 6(6):936-941.

(9.) Bitman J, Hamosh M, Hamosh P. Milk composition and volume during the onset of lactation in a diabetic mother. Am J Clin Nutr 1989; 50(6):1364-1369.

(10.) Arthur PG, Smith M, Hartmann PE. Milk lactose, citrate, and glucose as markers of lactogenesis in normal and diabetic women. I Pediatr Gastroenterol Nutr 1989; 9(4):488-496.

(11.) Neubauer SH, Ferris AM, Chase CG, Fanelli J, Thompson CA, Lammi-Keefe CJ, Clark RM, Jensen RG, Bendel RB, Green KW. Delayed lactogenesis in women with insulin-dependent diabetes mellitus. Am J Clin Nutr 1993; 58(1):54-60

(12.) Van Beusekom CM, Zeegers TA, Martini IA, Velvis HJ, Visser GH, van Doormaal JJ, Muskiet FA. Milk of patients with tightly controlled insulin-dependent diabetes mellitus has normal macronutrient and fatty acid composition. Am J Clin Nutr 1993; 57(6):938-943.

(13.) Jackson MB, Lammi-Keefe CJ, Jensen RG. Total lipid and fatty acid composition of milk from women with and without insulin-dependent diabetes mellitus. Am J Clin Nutr 1994; 60(3):353-361.

(14.) Lammi-Keefe CJ, Jonas CR, Ferris AM, Capacchione CM. Vitamin E in plasma and milk of lactating women with insulin-dependent diabetes mellitus. J Pediatr Gastroenterol Nutr 1995; 20(3):305-309.

(15.) Oliveira AMDM, Cunha CC, Penha-Silva N, Abdallah VOS, Jorge PT. Interference of the blood glucose control in the transition between phases I and II of lactogenesis in patients with type 1 diabetes mellitus. Arq. Bras. Endocrinol Metabol. 2008; 52(3):473-481.

(16.) Morceli G, Franca EL, Magalhaes VB, Damasceno DC, Calderon IMP, Honorio-Franca AC, Diabetes induced immunological and biochemical changes in human colostrum. Acta Paediatr 2011; 100(4):550-556.

(17.) Dritsakou K, Liosis G, Valsami G, Polychronopoulos E, Skouroliakou M. The impact of maternal- and neonatal-associated factors on human milk's macronutrients and energy. J Matern Fetal Neonatal Med 2017; 30(11):1302-1308.

(18.) Massmann PF, Franca EL, Souza EG, Souza MS, Brune MFSS, Honorio-Franca AC. Maternal hypertension induces alterations in immunological factors of colostrum and human milk. Front Life Sci 2013; 7(34):155-163.

(19.) Makela J, Linderborg K, Niinikoski H, Yang B, Lagstrom H. Breast milk fatty acid composition differs between overweight and normal weight women: the STEPS Study. Eur J Nutr 2013; 52(2):727-735

(20.) Fujimori M, Franca EL, Fiorin V, Morais TC, Honorio-Franca AC, Abreu LC. Changes in the biochemical and immunological components of serum and colostrum of overweight and obese mothers. BMC Pregnancy Childbirth 2015; 15:166.

(21.) Bachour P, Yafawi R, Jaber F. Effects of smoking, mother's age, body mass index, and parity number on lipid, protein, and secretory immunoglobulin A concentrations of human milk. Breastfeed Med 2012; 7(3):179-188.

(22.) Sociedade Brasileira de Cardiologia, Sociedade Brasileira de Hipertensao, Sociedade Brasileira de Nefrologia. VI Diretrizes Brasileiras de Hipertensao. Arq. Bras. Cardiol. 2010; 95(1):1-51.

(23.) Freire CMV, Tedoldi CL. Hipertensao arterial na gestacao. Arq. Bras. Cardiol. 2009; 93(6):159-165.

(24.) Sirio MAO, Silva ME, Paula H, Passos MC, Sobrinho AOS. Estudo dos determinantes clinicos e epidemiologicos das concentracoes de sodio e potassio no colostro de nutrizes hipertensas e normotensas. Cad Saude Publica 2007; 23(9):2205-2214.

Article submitted 30/12/2016

Approved 19/10/2017

Final version submitted 21/10/2017

Yasmin Notarbartolo di Villarosa do Amaral (http://orcid.org/0000-0001-8159-0564) [1]

Daniele Marano Rocha (http://orcid.org/0000-0001-6985-941X) [1]

Leila Maria Lopes da Silva (https://orcid.org/0000-0001-6275-8392) [1]

Fernanda Valente Mendes Soares (http://orcid.org/0000-0001-5720-0482) [1]

Maria Elisabeth Lopes Moreira (http://orcid.org/0000-0002-2034-0294) 1

[1] Instituto Nacional da Saude da Mulher. da Crianca e do Adolescente Fernandes Figueira, Fiocruz. Av. Rui Barbosa 716, Flamengo. 22250-020 Rio de Janeiro RJ Brasil. yasminamaral@ hotmail.com

Caption: Figure 1. Flowchart of the paper selection process--PRISMA.
Table 1. Year of publication, origin, sample size and age of
participants of selected studies, 1987-2016.

        Authors            Year of publication     Country

Butte et al. (8)                  1987               USA
Bitman et al. (9)                 1989               USA
Arthur et al. (10)                1989            Australia
Neubauer et al. (11)              1993               USA
Beusekom et al. (12)              1993           Netherlands
Jackson et al. (13)               1994               USA
Lammi-Keefe et al. (14)           1995               USA
Oliveira et al. (15)              2008             Brazil
Morceli et al. (16)               2010             Brazil
Bachour et al. (17)               2012             Lebanon
Massmann et al. (18)              2013             Brazil
Makela et al. (19)                2013             Finland
Fujimori et al. (20)              2015             Brazil
Dritsakou et al. (21)             2016             Greece

        Authors            Sample (n)   Age (years)

Butte et al. (8)               47         29 (1)
Bitman et al. (9)              14       23-39 (2)
Arthur et al. (10)             44       24-40 [2]
Neubauer et al. (11)           77           NA
Beusekom et al. (12)           11       23-30 (2)
Jackson et al. (13)            77           NA
Lammi-Keefe et al. (14)        43           NA
Oliveira et al. (15)           30         22 (1)
Morceli et al. (16)            45       18-35 (2)
Bachour et al. (17)            66         29 (1)
Massmann et al. (18)           23       18-35 (2)
Makela et al. (19)            100       17-43 (2)
Fujimori et al. (20)           68       18-36 (2)
Dritsakou et al. (21)         305         32 (1)

(1) Mean age. (2) Minimum and maximum age.

Chart 1. Morbidity, method used to evaluate the composition of human
milk and analyzed milk phase, 1987-2016.

       Authors             Disease      Method used to evaluate human
                                               milk composition

Butte et al. (8)        Type 1 DM (1)   The total protein was
                                        determined by the Kjeldahl
                                        method, lactose by enzymatic
                                        hydrolysis and fat by
                                        gravimetry after extraction
                                        with methylene chloride by the
                                        modified Roese-Gottlieb method

Bitman et al. (9)       Type 1 DM (1)   The total protein was
                                        determined by the
                                        bicinchoninic acid method and
                                        fat by chromatography

Arthur et al. (10)      Type 1 DM (1)   Lactose was determined by
                                        enzymatic hydrolysis

Neubauer et al. (11)    Type 1 DM (1)   Total protein was determined
                                        by the Kjeldahl method,
                                        lactose was determined using
                                        the industrial model analyzer
                                        27

Beusekom et al. (12)    Type 1 DM (1)   Total protein was determined
                                        by the bicinchoninic acid
                                        method, fat and lactose by
                                        chromatography

Jackson et al. (13)     Type 1 DM (1)   Total fat was determined by
                                        gravimetry using the modified
                                        Folch method

Lammi-Keefe             Type 1 DM (1)   Total fat was determined by
et al. (14)                             gravimetry using the modified
                                        Folch method

Oliveira et al. (15)    Type 1 DM (1)   Lactose was dosed according to
                                        the colorimetric method

Morceli et al. (16)     DM (1)          The total protein was
                                        determined by the colorimetric
                                        method, lipids and total
                                        calories were determined
                                        through the creamatocrit

Bachour et al. (21)     Overweight      Total protein was determined
                                        by the Bradford method and
                                        total fat by gravimetry using
                                        the modified Folch method

Massmann et             SAH (2)         The total protein was
al. (18)                                determined by the Biuret
                                        colorimetric method

Makela et al. (19)      Overweight      Total fat was determined by
                                        chromatography

Fujimori et al. (20)    Overweight      The fat and the total
                                        energetic value were
                                        determined by the creamatocrit
                                        and total protein by the
                                        Biuret colorimetric method

Dritsakou et al. (17)   Gestational     Miris[R] Human Milk Analyzer
                        DM (1) and
                        Overweight

       Authors             Disease           Analyzed milk phase

Butte et al. (8)        Type 1 DM (1)   Mature Milk

Bitman et al. (9)       Type 1 DM (1)   Colostrum

Arthur et al. (10)      Type 1 DM (1)   Colostrum

Neubauer et al. (11)    Type 1 DM (1)   Colostrum, Transition Milk and
                                        Mature Milk

Beusekom et al. (12)    Type 1 DM (1)   Colostrum, Transition Milk and
                                        Mature Milk

Jackson et al. (13)     Type 1 DM (1)   Colostrum, Transition Milk and
                                        Mature Milk

Lammi-Keefe             Type 1 DM (1)   Colostrum,
et al. (14)                             Transition Milk and Mature
                                        Milk

Oliveira et al. (15)    Type 1 DM (1)   Colostrum

Morceli et al. (16)     DM (1)          Colostrum

Bachour et al. (21)     Overweight      Transition Milk and Mature
                                        Milk

Massmann et             SAH (2)         Colostrum,
al. (18)                                Transition Milk and Mature
                                        Milk

Makela et al. (19)      Overweight      Mature Milk

Fujimori et al. (20)    Overweight      Colostrum

Dritsakou et al. (17)   Gestational     Colostrum, Transition Milk and
                        DM (1) and      Mature Milk
                        Overweight

(1) Diabetes Mellitus. (2) Arterial hypertension.

Chart 2. Type of study, controlled confounding factors and
main results, 1987-2016.

                    Type of             Confounding factors
    Authors          study           controlled in the analysis

Butte et al. (8)   Case-       Age, height, gestational
                   control     weight gain, parity, newborn birth
                               weight

Bitman et          Case-       Not informed
al. (9)            control

Arthur et          Case-       Maternal age
al. (10)           control     and gestational age

Neubauer           Cohort      Gestational age, delivery
et al. (11)                    type, newborn gender and if already
                               breastfed

Beusekom           Case-       Gestational age, delivery type,
et al. (12)        control     newborn birth weight

Jackson et         Case-       Maternal age, gestational
al. (13)           control     weight gain, parity, schooling,
                               gestational age, delivery type, newborn
                               gender and time of previous
                               breastfeeding

Lammi-             Case-       Gestational age, delivery
Keefe et           control     type, newborn gender and if
al. (14)                       already breastfed

Oliveira et        Cohort      Maternal age, pre-gestational
al. (15)                       body mass index, weight gain during
                               gestation, type and number of
                               deliveries and gestational age of
                               newborn

Morceli et         Cross-      Tobacco use, arterial
al. (16)           sectional   hypertension and glycemia

Bachour et         Cohort      Maternal age, tobacco
al. (21)                       use, parity, lactation stage,
                               residential area and use of medicines

Massmann           Cohort      Tobacco use, diabetes and
et al. (18)                    mean pressure during gestation

Makela et          Cross-      Maternal age, schooling,
al. (19)           sectional   household income, gestational weight
                               gain and maternal diet

Fujimori et        Cross-      Maternal age, gestational age,
al. (20)           sectional   tobacco use, hypertension, pre-
                               gestational body mass index,
                               gestational or chronic diabetes

Dritsakou          Cohort      Not informed
et al. (17)

                    Type of
    Authors          study                     Results

Butte et al. (8)   Case-       The concentrations of total protein,
                   control     lactose, fat and energy did not differ
                               from the concentrations found in the
                               milk of the reference population

Bitman et          Case-       The fat content of the milk secreted by
al. (9)            control     the diabetic woman tended to be lower
                               compared to the control group; the
                               values of protein and lactose did not
                               differ

Arthur et          Case-       The lactose content of the milk
al. (10)           control     secreted by the diabetic woman was
                               lower on the 1st and 2nd day postpartum

Neubauer           Cohort      The milk of women with diabetes had
et al. (11)                    less lactose and a higher concentration
                               of protein on the 2nd and 3rd day
                               postpartum

Beusekom           Case-       Mean total fat was lower in the milk of
et al. (12)        control     women with diabetes, but there was no
                               difference in lactose and total protein
                               values

Jackson et         Case-       The mean total fat was lower in the
al. (13)           control     milk of women with diabetes on the 2nd
                               and 3rd day postpartum.

Lammi-             Case-       There was no significant difference in
Keefe et           control     lipid content between the three groups
al. (14)                       throughout the study

Oliveira et        Cohort      Both groups showed increased
al. (15)                       concentration of lactose from 1 to 5
                               days postpartum. A lower concentration
                               of lactose was observed in colostrum in
                               the group of women with diabetes.

Morceli et         Cross-      Total protein concentration was similar
al. (16)           sectional   between normoglycemic and diabetic
                               mothers. Fat concentration was
                               significantly lower in the colostrum of
                               diabetic mothers, but the total energy
                               value did not differ

Bachour et         Cohort      Protein concentration was lower and fat
al. (21)                       concentration was higher in mature milk
                               of overweight mothers

Massmann           Cohort      Colostrum and mature milk from
et al. (18)                    hypertensive mothers had higher levels
                               of total protein

Makela et          Cross-      The total fat content of the milk did
al. (19)           sectional   not differ between overweight and
                               normal weight women

Fujimori et        Cross-      The fat and energy content was higher
al. (20)           sectional   among obese women when compared to the
                               eutrophic group, whereas the protein
                               content did not show differences

Dritsakou          Cohort      The fat and energy content of both
et al. (17)                    colostrum and transition milk were
                               higher in overweight women, whereas in
                               mature milk only higher fat levels were
                               estimated. Women with diabetes had
                               higher energy values in colostrum,
                               transition milk and mature milk, and
                               lower values of protein in transition
                               and mature milk
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Author:Amaral, Yasmin Notarbartolo di Villarosa do; Rocha, Daniele Marano; da Silva, Leila Maria Lopes; Soa
Publication:Ciencia & Saude Coletiva
Article Type:Bibliografia
Date:Jul 1, 2019
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