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Can GLP-1s Affect Fertility?

Short answer

GLP-1 medications are not fertility drugs, but they can affect fertility indirectly. Weight loss and better insulin sensitivity may support more regular ovulation, especially with PCOS, and may support hormone balance in men. They are not recommended during pregnancy, so talk with your provider before trying to conceive.

DrWell programs use compounded medications, which are not FDA approved. Talk with your provider about whether a program is right for you.

Medically reviewed/Jonathan Kaplan, MD, MPH/February 16, 2026/4
Can GLP-1s Affect Fertility?
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GLP-1 medications are best known for weight management, and a new question keeps coming up: can they affect fertility? The honest answer is that it depends on your health picture. There is promising data, real unknowns, and one firm rule about pregnancy. Here is what is known, what is still being studied, and what to discuss with a provider.

What are GLP-1s?

GLP-1 receptor agonists, usually called GLP-1s, are medications that mimic a natural hormone called glucagon-like peptide-1. Semaglutide and tirzepatide are the best known. They influence:

  • Blood sugar regulation
  • Insulin sensitivity
  • Appetite signaling
  • How quickly the stomach empties

They were not created to treat infertility. Any effect on reproductive health is thought to come indirectly, through metabolic changes.

Can GLP-1s affect female fertility?

For women, metabolic health and reproductive health are closely linked. Insulin resistance, chronic inflammation, and excess body weight can disrupt ovulation and make it harder to conceive. GLP-1s improve insulin sensitivity, may reduce inflammation, and support weight loss, which is why researchers are interested in them.

This is especially relevant for polycystic ovary syndrome (PCOS), where irregular cycles and high androgen levels are common. By improving insulin regulation and supporting weight loss, GLP-1s may help restore more regular ovulation in some women with PCOS. Research is still developing, and GLP-1s are not a fertility treatment.

Can GLP-1s affect male fertility?

Obesity, insulin resistance, and chronic inflammation can lower testosterone and reduce sperm quality. By supporting metabolic health, GLP-1s may create a more favorable environment for male fertility. Research on GLP-1s and sperm health specifically is limited, and long-term studies are needed.

Are GLP-1s safe during pregnancy?

GLP-1 medications are not recommended during pregnancy. Most providers advise stopping treatment if you become pregnant, and many advise stopping before you start trying to conceive. Some product labels recommend stopping semaglutide at least two months before a planned pregnancy, so ask your provider when to stop for the medication you take.

GLP-1s have not been fully studied in pregnant people. Some studies of women who learned they were pregnant while on a GLP-1 and then stopped did not find a significant increase in major birth defects, but that evidence is limited and does not make these medications safe to use in pregnancy.

Birth control and GLP-1s

Weight loss and improved metabolic health can make ovulation more regular, which means pregnancy may become possible sooner than you expect. Tirzepatide may also make oral birth control pills less effective, especially after starting or raising the dose. If you are not planning to conceive, ask your provider whether you need an additional or non-oral method of birth control.

What researchers still need to answer

This is a fast-moving area. Open questions include:

  • How GLP-1s affect fertility in women without PCOS
  • Whether GLP-1s have any direct effect on reproductive hormones
  • The best timing and dosing when preparing for pregnancy
  • Long-term effects on fertility in women and men

Metabolic health is fertility health

Your reproductive system does not work in isolation. Blood sugar stability, hormone balance, inflammation, and overall metabolic health all affect fertility. For some people, GLP-1 therapy can be one part of getting the body ready for conception, under the guidance of a provider who knows your goals and timeline.

DrWell’s GLP-1²

GLP-1² is a compounded combination of semaglutide and tirzepatide that providers prescribe to support weight management and metabolic health. Compounded medications are not FDA approved, and treatment is personalized based on your health history, goals, and provider guidance. If you are pregnant, planning to become pregnant, or breastfeeding, tell your provider before starting.

Frequently asked questions

Does GLP-1 affect fertility?

GLP-1s are not fertility drugs, but they may affect fertility indirectly by improving insulin sensitivity, inflammation, and weight. The effect varies by person, and research is still developing.

Do GLP-1s increase fertility?

For some women, especially those with PCOS, weight loss and better insulin regulation may lead to more regular ovulation. That is not the same as a medication that increases fertility, and results are not guaranteed.

Does GLP-1 affect male fertility?

Early evidence does not suggest harm, and better metabolic health may support hormone levels and sperm quality. Long-term studies are limited.

Can you take a GLP-1 while trying to get pregnant?

No. GLP-1s are not recommended during pregnancy, and many providers advise stopping before trying to conceive. Talk with your provider about when to stop.

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