Printer Friendly

Sibling donor oocytes linked to fewer problems.

COPENHAGEN -- The higher rate of obstetric complications documented in donor oocyte pregnancies is confined to those pregnancies in which the oocyte donor is not related to the recipient, according to Korean researchers.

In fact, pregnancies achieved through in vitro fertilization procedures involving oocytes donated by a sibling have a complication rate similar to that of in vitro fertilization pregnancies that do not involve donor oocytes, reported S.H. Cha, M.D., in a study that was directed by M.K. Koong, M.D., from Samsung Cheil Hospital, Sungkyunkwan University, Seoul.

This is the first report linking different degrees of oocyte allogenicity to obstetric complications, suggesting that this phenomenon could be due to immunologic factors, Dr. Cha said during the annual meeting of the European Society for Human Reproduction and Embryology.

It has been well documented that pregnancies achieved using donor oocytes demonstrate increased rates of pregnancy-induced hypertension and first-trimester bleeding, Dr. Cha said. Possible explanations for these findings include primiparity, the higher rate of multiple pregnancies, and the increased maternal age of this obstetric population.

Dr. Cha's study compared 61 pregnancies resulting from oocyte donation and 127 pregnancies from standard, nondonor in vitro fertilization (controls). Of the donor pregnancies, 36 involved oocytes from siblings and 25 involved oocytes from nonsiblings.

As expected, the donor group had a much higher rate of early pregnancy loss (34% vs. 13%), second-trimester bleeding (13% vs. 1%), and pregnancy-induced hypertension (12.5% vs. 4%), compared with the controls.

But when the donor group was subdivided into sibling and nonsibling donors, the complications were largely concentrated in the nonsibling donor group. The sibling donor group showed a complication rate that was only slightly (and not statistically significantly) higher than that of the controls, Dr. Cha said. (See table.)

"These data suggest that PIH [pregnancy-induced hypertension] appears to occur more often in pregnancies following oocyte donation from immunologically unrelated donors. Therefore, women who become pregnant after oocyte donation from immunologically unrelated donors should be considered as high risk," she noted.

ARTICLES BY KATE JOHNSON

Montreal Bureau
Complications in IVF Pregnancies Highest When Nonsibling Donor Oocytes
Used

 Percentage of Pregnancies Using:
 Nonsibling Sibling No donor
 donor oocytes donor oocytes oocytes

Early pregnancy loss 40.0% 28.0% 13.0%
Second-trimester bleeding 29.0% 4.2% 1.0%
Pregnancy-induced 20.0% 8.0% 3.7%
 hypertension

Note: Based on data from 61 pregnancies resulting from donor IVF and 127
resulting from nondonor IVF.
Source: Dr. Cha
COPYRIGHT 2005 International Medical News Group
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2005 Gale, Cengage Learning. All rights reserved.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:Obstetrics
Author:Johnson, Kate
Publication:OB GYN News
Date:Aug 1, 2005
Words:407
Previous Article:Reform Stark antikickback statutes.
Next Article:Carrier couples have same chance of having healthy baby, despite miscarriages.
Topics:

Terms of use | Copyright © 2018 Farlex, Inc. | Feedback | For webmasters