Chances for Premature Babies Increase after Abortion
A French study of 2,837 births found that women who had abortions were one and a half times as likely to have premature births in subsequent pregnancies as women who hadn't had abortions. The study found that the increase was especially significant for those women who had multiple abortions. The report also revealed that extremely premature deliveries had an especially high association with previous abortions. The study suggests that surgical abortions may cause damage to the cervix and uterus that increase the risk for premature birth.
The results of the study were published by England's Royal College of Obstetricians and Gynecologists in the April edition of BJOG: An International Journal of Obstetrics and Gynaecology. To reach their findings, the study's 14 authors examined data collected in France that included about one-third of all births in that country for 1998. The data was based on 2,219 premature births and 618 births that were delivered after a normal length of pregnancy and were used as a control group.
The study found that women who had abortions were 1.7 times more likely to deliver a baby 22 to 27 weeks into pregnancy, considered extremely premature by the study, than those who had never had abortions. Having an abortion made women 1.4 times as likely to have premature baby at both 28 to 32 weeks into pregnancy (considered very premature) and 33 to 24 weeks into pregnancy (considered moderately premature). Among women who delivered at 22 to 27 weeks, 18 percent had previously induced abortions. Among women who delivered at 28 to 32 weeks, the percentage who had previously had abortions was 14.6. And for women who delivered at 33 to 34 weeks the figure was 15.6 percent. For comparison 10 percent of women who carried their baby to full term had previously had abortions. Another key finding was that multiple abortions greatly increased the chances for a premature delivery. Women with more than one abortion were 2.6 times as likely to have a very premature birth as non-abortive women.
Premature births are a serious health concern according to the report because "infants born before 33 weeks of gestation have a higher risk of morbidity and mortality than more mature babies." The study does not conclusively offer an explanation for why abortion increases the chances for premature birth but it did find that a "history of induced abortion was associated with an increased risk of premature rupture of the membranes," vaginal bleeding, and "spontaneous preterm labor that occur at very small gestational ages." The report notes "[p]revious studies have suggested that infectious diseases following induced abortion account for the increase in the risk of preterm delivery." One such study "found that women who had previously undergone an induced abortion were at higher risk than other women" for infections of the amniotic fluid, placenta and uterus.
In examining possible methodological flaws, the article states that if abortions were underreported it would have likely been among those women of who had delivered prematurely thus resulting in an "under-estimation of the association" between premature delivery and abortion.
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