What Pregnancy Complications are Associated with PCOS?

Risks to Mom and Baby and How You Might Prevent Them

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Most women with PCOS are aware that they may have some difficulty becoming pregnant. Irregular periods and absent ovulation can make it challenging to time intercourse for pregnancy and commonly leads a couple to seek out the assistance of a reproductive specialist.

But many women aren’t aware that having PCOS can also increase her risk for certain pregnancy-related complications. Though rest assured these complications aren't common, a woman should still visit her obstetrician regularly and follow her recommendations for prenatal screening.


Women who have PCOS do appear to be at a slightly higher risk for having a miscarriage, though the cause for this relationship is unclear. Researchers believe that a few factors may be to blame. First, women with PCOS tend to have longer menstrual cycles, meaning that ovulation occurs later on. This exposes the developing egg to lots of hormones, possibly damaging it.

Second, there is a known relationship between uncontrolled blood sugar and miscarriage. Given that women with PCOS tend to have insulin resistance and elevated insulin levels, some researchers hypothesize that this may contribute to poor egg quality and miscarriage. High androgen levels and endometrial dysfunction, meaning problems with implantation, may also play a role in the increased risk of early pregnancy loss in women with PCOS-- though more research is needed before a clear association can be developed.

Pregnancy-Induced Hypertension and Preeclampsia

Pregnancy-induced hypertension, or PIH, refers to women who develop new onset high blood pressure after 20 weeks.

Preeclampsia is a serious health condition that also develops in the second half of pregnancy and causes protein in the urine, in addition to high blood pressure. The loss of protein in the urine leads to swelling and signals a problem with the kidneys.

If left untreated, preeclampsia can progress to the severe form of the syndrome called eclampsia, which can cause seizures, blindness, and/or coma.

In serious cases, both maternal and fetal death can result.

Every time you visit your doctor, she will check your blood pressure and take a urine sample to look for protein in the urine. This is to make sure that you are not developing preeclampsia. If you are diagnosed with preeclampsia, treatment involves bed rest, frequent monitoring, and medication to hopefully lower your blood pressure. If your blood pressure does not decrease, the only known cure is to deliver the baby. The goal is to get the baby as far along in the pregnancy as possible so that the lungs have a chance to develop.

Women with PCOS tend to have higher blood pressure to begin with, increasing their risk for developing PIH. This is why it's important to watch out for signs and symptoms of PIH and preeclampsia (swelling, rapid weight gain, severe headache, vision changes) and promptly report them to your doctor, or proceed to the emergency room if necessary.

Gestational Diabetes

Gestational diabetes occurs when diabetes, an alteration in how the body processes sugar, develops during pregnancy.

While the condition usually resolves after giving birth, a woman with gestational diabetes is more likely to develop type 2 diabetes later in life, requiring ongoing monitoring of blood sugar levels.

All pregnant women are monitored for gestational diabetes with routine blood sugar screening sometime between 26 and 28 weeks. Women with known diabetes, insulin resistance, or who are at higher risk for developing gestational diabetes may be screened earlier. Women who are older than 25, have had gestational diabetes with prior pregnancies, who are overweight, who have prediabetes, or who have close family members who have been diagnosed with type 2 diabetes are at greater risk for developing gestational diabetes. Women with PCOS are a part of that group because of the association with insulin resistance and prediabetes.

Gestational diabetes can be treated with a combination of lifestyle changes or medication if necessary. It's important to be vigilant about monitoring your blood sugar as directed by your physician because babies born to mothers with gestational diabetes are at higher risk for high birth weight, preterm birth, respiratory issues at birth, low blood sugar, and jaundice.

Premature Delivery

Women with PCOS are also at risk of delivering their baby early. The reason behind this again is not totally clear. Experts do know that preeclampsia is a risk factor for premature delivery, and women with PCOS are at a higher risk of preeclampsia. 

In addition, experts have found that babies born to moms with PCOS are more likely to be large (called large for gestational age), have meconium aspiration (when a baby's first stool gets into their lungs), and have a low Apgar score at five minutes. 

Preventing Pregnancy Complications in PCOS

Some of these complications sound pretty scary, but there are many things that you can do to help prevent them. First and foremost is to get regular prenatal care as early into the pregnancy as possible. Even better would be to see your doctor before trying to conceive so that you can discuss specific steps to lower your risks -- like optimizing your weight.

Second, make some positive lifestyle changes. Even though they may be hard to implement, remember that you are doing it for your baby (and for yourself). For instance, discuss an exercise regimen with your doctor, and if you struggle with healthy eating habits, ask for a referral to a nutritionist. 


American Diabetes Association. (2013). Before Pregnancy.

American Pregnancy Association. Polycystic ovarian syndrome

Kamalanathan, S., Sahoo, J.P., & Sathyapalan, T. Pregnancy in polycystic ovary syndrome. Indian Journal of Endocrinology and Metabolism, Jan-Feb;17(1):37-43.

Roos, N., Sahlin, K.H., Ekman-Ordeberg, G., Falconer, H., & Stephansson, O. (2011). Risk of adverse pregnancy outcomes in women with polycystic ovary syndrome: population based cohort study. BMJ, Oct 13;343:d6309.

DISCLAIMER: The information in this site is for educational purposes only. It should not be used as a substitute for personal care by a licensed physician. Please see your doctor for diagnosis and treatment of any concerning symptoms or medical condition.

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