Becoming pregnant while taking birth manage pills doesn"t seem to increase the risk of birth defects, a brand-new study suggests.

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WEDNESDAY, Jan. 6, 2016 (HealthDay News) -- ending up being pregnant while acquisition birth control pills doesn"t seem to increase the risk of bear defects, a new study suggests.

Researchers found similar rates of bear defects -- around 25 babies out that 1,000 -- amongst women who never used birth control pills and those who took them prior to pregnancy or took them prior to realizing they were pregnant.

"Women who end up being pregnant either shortly after stopping oral contraceptives, or even while acquisition them, should understand that this exposure is unlikely to cause the fetus to construct a bear defect," claimed lead researcher Brittany Charlton.

"This need to reassure women and also their doctors," claimed Charlton, an instructor in the room of epidemiology at Harvard"s T.H. Chan institution of Public wellness in Boston.

However, she cautioned the this examine can"t prove that birth regulate pills don"t reason birth defects, just that there appears to it is in no link.

Dr. Jennifer Wu, an obstetrician and also gynecologist at Lenox Hill Hospital in brand-new York City, stated the examine findings aren"t surprising.

"It"s something we have known because that a while," she said. Still, "many women in the United claims are on birth manage pills, so it"s reassuring to know that castle don"t cause any type of birth defects, and also women don"t have to worry about it during pregnancy."

Although oral contraceptives space highly effective at staying clear of pregnancy, about 9 percent the women acquire pregnant the an initial year of making use of them. Usually this is since they to let go a sheep or offered other drugs -- consisting of anti-seizure drugs, antibiotics, antidepressants or part HIV drugs -- that have the right to make the contraceptive much less effective, Charlton said.

In countless other cases, women avoid taking "the pill" when they desire to conceive and become pregnant within a couple of months.

Whether the hormone in birth manage pills could impact fetal advancement when used roughly the time that conception hasn"t been well-studied, the examine authors described in lift notes.

For the study, the researchers supplied national medical registries to collect data indigenous Denmark from 1997 to 2011 on all live births, birth defects and mothers" clinical conditions.

Among more than 880,000 births, 2.5 percent the the babies had actually a bear defect such together a cleft palate or an eight or leg defect, the researchers found.

Specifically, Charlton"s team found that because that every 1,000 births, 25.1 infants of mother who never used the pill had birth defects, together did 25.0 of infants of mother who had actually used birth regulate pills more than three months prior to pregnancy. The rate was 24.9 among mothers who supplied birth manage pills within three months of coming to be pregnant, and 24.8 among mothers who used the pill prior to realizing they to be pregnant.

"The ubiquity of birth defects was consistent throughout each of the oral contraceptive groups as well as when we added in pregnancies that finished as stillbirths or induced abortions," Charlton said. "Similarly, the results were likewise consistent also when we damaged down the bear defects into different subgroups, favor limb defects," she added.

In all, the study discovered that 68 percent that mothers had used birth manage pills, yet stopped an ext than three months prior to pregnancy, and 21 percent had never provided them. Also, 8 percent that the women had stopped using dental contraceptives within three months of conception, and also 1 percent offered them after acquiring pregnant, the researchers said.

Charlton"s team excluded any type of infants with defects led to by known factors, such as fetal alcohol syndrome or chromosomal abnormalities.

The researchers likewise accounted because that risk determinants that can increase the odds of a birth defect. These contained the mother"s age, family members income, level of education, history of bear defects, smoking during pregnancy, use of prescription drugs and hospital admissions.

The research findings were published online Jan. 6 in BMJ.

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According come Wu, this study mirrors that women shouldn"t concern that getting pregnant if on a birth control pill will cause an abnormal pregnancy.

SOURCES: Brittany Charlton, Sc.D., instructor, department of epidemiology, Harvard T.H. Chan college of public Health, Boston; Jennifer Wu, M.D., obstetrics and also gynecology, Lenox Hill Hospital, brand-new York City; Jan. 6, 2016, BMJ, online