
The second trimester is often called the golden period of pregnancy. Energy levels usually improve, morning sickness fades, and you finally start to feel that pregnancy glow. But if you have PCOS, you might still be navigating some unique challenges—especially when it comes to insulin resistance.
As pregnancy progresses, your body naturally becomes more insulin resistant to make sure you store fat and your baby gets enough nutrients. That is completely normal. But if you already had insulin resistance before pregnancy, this shift can make things trickier. Managing insulin levels during the second trimester is just as important as it was in the first, and keeping them in check can help prevent complications down the road.
How Insulin Resistance Changes in the Second Trimester
If you have PCOS, you are probably familiar with insulin resistance. But pregnancy takes it to another level. As hormones shift, insulin resistance increases, which means your body has to work harder to regulate blood sugar. For women with PCOS, this can increase the risk of certain pregnancy complications.
- Gestational diabetes. Since insulin resistance peaks in the second trimester, this is when many women are diagnosed with gestational diabetes. Women with PCOS have a higher risk, so it is important to monitor insulin levels early.
- Pre-eclampsia. High insulin levels can contribute to high blood pressure, which increases the risk of pre-eclampsia. This condition can affect both mom and baby, so keeping insulin in check is a key part of prevention.
- Fetal overgrowth. If insulin levels are too high, babies tend to produce more of their own insulin, which can cause excessive growth (macrosomia). This can make delivery more complicated and increase the risk of a C-section.
The good news? Managing insulin resistance through diet, movement, and lifestyle choices can help keep these risks low.
The Role of Inflammation in Pregnancy
Another thing to consider in the second trimester is inflammation. While some inflammation is normal and even necessary for immune function, too much can cause problems.
- By week 20, your antibodies start crossing the placenta, giving your baby passive immunity until their own immune system matures.
- If inflammation is too high, it can interfere with this process, making it harder for your baby to get the immune protection they need.
Since high insulin levels drive inflammation, keeping insulin stable can also help lower overall inflammation and make sure your baby has a strong immune system.
Managing PCOS in the Second Trimester
The second trimester is an important time to stay on top of insulin resistance. Here are some simple ways to help keep things in balance.
- Test insulin levels early. Don’t wait until a gestational diabetes test at 24 to 28 weeks. Insulin resistance starts much earlier, so checking insulin levels in the first trimester (or even before pregnancy) can help you get ahead of any issues.
- Follow a Low Insulin Lifestyle. Avoiding foods that spike insulin can help keep insulin levels stable and prevent unnecessary spikes. Instead, focus on non-starchy vegetables, lean proteins, healthy fats, nuts, seeds, and whole fruits.
- Move your body daily. You don’t need intense workouts—just keep moving. Walking, stretching, or prenatal yoga can all help improve insulin sensitivity and keep inflammation in check.
- Lower stress when you can. Chronic stress increases cortisol, which can drive insulin levels higher. Small things like deep breathing, relaxing in the evening, or even just getting outside for some fresh air can help.
Supporting a Healthy Pregnancy
The second trimester is such an exciting time, and managing insulin resistance now can make a huge difference in how you feel as your pregnancy progresses. The goal is not perfection—it is just about making small, consistent choices that support your health and your baby’s health.
Following a Low Insulin Lifestyle before and during pregnancy can make a world of difference. For women with PCOS, managing insulin resistance is one of the most powerful ways to support a healthy pregnancy and give their baby the best possible start.
References:
Puttabyatappa M, et al. Developmental programming of insulin resistance: are androgens the culprits? J Endocrinol. 2020. Read more
Karcz K, Królak-Olejnik B. Impact of Gestational Diabetes Mellitus on Fetal Growth and Nutritional Status in Newborns. Nutrients. 2024. Read more