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Pregnancy Timeline by SemestersFemale Reproductive SystemFertilizationThe Appearance of SomitesFirst TrimesterSecond TrimesterThird TrimesterFetal liver is producing blood cellsHead may position into pelvisBrain convolutions beginFull TermWhite fat begins to be madeWhite fat begins to be madeHead may position into pelvisImmune system beginningImmune system beginningPeriod of rapid brain growthBrain convolutions beginLungs begin to produce surfactantSensory brain waves begin to activateSensory brain waves begin to activateInner Ear Bones HardenBone marrow starts making blood cellsBone marrow starts making blood cellsBrown fat surrounds lymphatic systemFetal sexual organs visibleFinger and toe prints appearFinger and toe prints appearHeartbeat can be detectedHeartbeat can be detectedBasic Brain Structure in PlaceThe Appearance of SomitesFirst Detectable Brain WavesA Four Chambered HeartBeginning Cerebral HemispheresEnd of Embryonic PeriodEnd of Embryonic PeriodFirst Thin Layer of Skin AppearsThird TrimesterDevelopmental Timeline
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February 1, 2012--------News Archive Return to: News Alerts

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Egg Donation Risks Similar in Older and Younger Moms

Although women over age 50 who become pregnant via egg donation are at an elevated risk for developing obstetrical complications, their complication rates are similar to those of younger recipients

The study was conducted by Columbia University Medical Center researchers to be published in the February 2012 issue of the American Journal of Perinatology.

The findings are contrary to epidemiological data suggesting that these women are at greater risk of certain complications of pregnancy, including hypertension, gestational diabetes, premature birth, and placenta abnormalities.

In the largest single-center study of older women who became pregnant from egg donation, Mark V. Sauer, MD; Daniel H. Kort, MD; and colleagues studied 101 women age 50 and over - comparing their pregnancy results with those of egg-donation recipients age 42 and younger.

The two groups were evaluated for significant differences in perinatal complications, gestational age at delivery, baby's birth weight, and mode of delivery. Although the women all received their fertility treatment at Columbia University Center for Reproductive Care, their prenatal care and delivery often took place elsewhere.

Both older and younger women had similar rates of gestational hypertension, diabetes, cesarean delivery, and premature birth. Two women in the older group experienced a serious adverse effect. A 56-year-old woman developed heavy vaginal bleeding at 29 weeks of pregnancy and had to deliver by emergency cesarean hysterectomy at 2 weeks later. She recovered with no further complications.

A 49-year-old woman (who would have been age 50 at term) died following acute cardiac arrest in her first trimester. The researchers believe that her death was unrelated to her pregnancy and more likely attributable to her heavy smoking habit, which she had not disclosed to her doctors.

The study concluded that all women who use egg donation to become pregnant are at an elevated risk for obstetrical complications, particularly hypertensive disorders and cesarean section; but women over age 50 do not appear to face any greater risk than their younger counterparts.

"It is imperative that all older women undergo thorough medical screening before attempting pregnancy to ensure the best possible outcome," said Mark Sauer, professor of obstetrics and gynecology at Columbia University Medical Center (CUMC). "But, really, that should apply to younger women, as well."

"Although many social and ethical questions surround the use of assisted reproductive technology by this age group, the current study confirms the high success rate and relative safety of such pregnancies in well-cared-for women," said Daniel H. Kort, a postdoctoral fellow in obstetrics and gynecology.

The study's authors are Daniel H. Kort, MD (CUMC); Jennifer Gosselin, PhD (CUMC); Janet M. Choi, MD (CUMC); Melvin H. Thornton, MD; Jane Cleary-Goldman, MD (Mount Sinai Medical Center); and Mark V. Sauer, MD (CUMC).

The researchers report no financial or other conflict of interest.

Columbia University Medical Center provides international leadership in basic, pre-clinical, and clinical research; in medical and health sciences education; and in patient care. Established in 1767, Columbia's College of Physicians and Surgeons was the first institution in the country to grant the M.D. degree and is among the most selective medical schools in the country. Columbia University Medical Center is home to the largest medical research enterprise in New York City and State and one of the largest in the United States. For more information, please visit www.cumc.columbia.edu.

Original article: http://www.eurekalert.org/pub_releases/2012-01/cumc-rop013112.php