Home > Health & Wellness > Health Library > Risks of Multiple Pregnancy
There are pregnancy problems that can be more likely with a multiple pregnancy.
Risks of multiple pregnancy may include:
Multiple pregnancies conceived by the use of assisted reproductive technology (ART) may have a greater risk of certain pregnancy problems. Talk to your doctor about the risks related to your treatment.
In the general population, less than 3 out of 100 births involve twins,
triplets, or more.1 Your chances of conceiving a multiple pregnancy
increase when you use fertility drugs and
assisted reproductive technology (ART).
Currently, about 20 out of 100 multiple pregnancies occur naturally, while
the other 80 out of 100 are the result of using fertility drugs or assisted reproductive
technology.2 The majority of these pregnancies are
twins, but there are also more triplets (or more) than in the general
When assisted reproductive technology (ART), such as IVF, is used, the risk of conceiving a multiple pregnancy is directly related to
the number of embryos transferred to a woman's uterus. Because of the risks of multiple pregnancy to the babies, experts recommend limiting the number of embryos transferred.
American College of Obstetricians and Gynecologists
(2004, reaffirmed 2009). Multiple gestation: Complicated
twin, triplet, and high-order multifetal pregnancy. ACOG Practice Bulletin No.
56. Obstetrics and Gynecology, 104(4):
Aubuchon M, et al. (2012). Infertility and assisted reproductive technology. In JS Berek, ed., Berek and Novak's Gynecology, 15th ed., pp. 1133–1189. Philadelphia: Lippincott Williams and Wilkins.
November 14, 2013
Kathleen Romito, MD - Family Medicine & Femi Olatunbosun, MB, FRCSC - Obstetrics and Gynecology
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