What about the next pregnancy? Surviving pregnancy, part 2.
Your care provider may have already performed tests to rule out risk factors, including: anemia, sexually transmitted diseases, urinary-tract infections, susceptibility to certain viral infections (including German measles and hepatitis), and vaginal infections that are associated with pre-term labor. If these tests were not done before you became pregnant, they may be performed at your initial pregnancy visit. You should also be tested for the human immunodeficiency virus (HIV) that causes AIDS. By law, your consent is required before this test can be performed and you are the only one to whom the results may be disclosed.
If there is an increased risk for chromosomal or genetic abnormalities, chorionic villus sampling (CVS) may be performed at ten to 12 weeks of pregnancy. This procedure is invasive (involving removal of a small piece of the placenta for examination), and should be done by a trained obstetric specialist; even so, complications in one to two percent of these cases lead to failure of the pregnancy. Genetic amniocentesis, another invasive diagnostic procedure, is performed at approximately 16 weeks of pregnancy. Amniocentesis has only 25 to 50 percent as many serious complications as CVS.
Perhaps the most important prenatal tests are ultrasound imaging studies. Although these studies are best done at the midpoint of pregnancy, earlier imaging may be appropriate in some cases. You and your care provider should discuss where these studies should be performed. In many cases, the services of a regional perinatal care center will be chosen so as to take advantage of the combination of experienced specialists in fetal imaging (sonologists), maternal-fetal medicine, and genetics.
These specialists can perform and interpret a "targeted" ultrasound study which looks for: abnormalities in the head and neck anatomy, spine, heart, chest and diaphragm, stomach, kidneys and bladder, abdominal wall and umbilical cord, upper and lower extremities, the placenta, and amniotic fluid volume. Targeted ultrasounds are usually performed at about 18 to 20 weeks. Further ultrasound studies may be recommended later in the pregnancy. This would be the case if there are risks that could affect the growth and development of the fetus, or possible difficulties affecting amniotic fluid volume or the function of the umbilical cord and its blood flow.
If a previous pregnancy was complicated by premature labor and birth, this pregnancy should be given special attention. If possible, you should work with an obstetrician. These specialists are trained to manage pregnancies in women with a history of premature labor. You should expect to make more frequent office visits and you may be asked to perform a daily self-assessment to monitor for the subtle signs and symptoms of premature labor. In some cases, your obstetrician may recommend the use of a home uterine activity monitoring system to document the frequency of uterine contractions which can provide helpful information about the status of your pregnancy. Other tests, including ultrasound imaging of the cervix and of the uterus, and laboratory tests that measure increased risk for premature labor, may be available for use in special circumstances. Discuss these with your physician. Ultrasound assessment in late pregnancy and electronic fetal monitoring, or "non-stress test," may be used to document the continued well-being of the intrauterine environment.
Caring for the child within you while caring for your child with special needs may be challenging. If your physician recommends inactivity because of your pregnancy history, you will need to find hands-on help to care for you child at home.
As you approach the anniversaries of birth dates and the gestational age at which you delivered your previous child, you may become psychologically and emotionally stressed in remembrance and anticipation. Your health care team should be prepared to discuss anniversary reactions, and to help you and your family through them.
John Joseph Botti, M.D., is professor of obstetrics and Gynecology, and Radiology for the Pennsylvania State Geisinger Health System, Hershey Medical Center, in Pennsylvania. He has spent more than 20 years as a specialist in maternal-fetal medicine, caring for high-risk women and families.
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|Publication:||The Exceptional Parent|
|Date:||Mar 1, 1998|
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