GLP-1 Pregnancy Safety
GLP-1 agonists have long half-lives. This tool helps you track the recommended 60-day washout period required before attempting to conceive.
The date you plan to stop or actually stopped the medication
Determines the half-life for calculation
Why should I stop GLP-1 medications before becoming pregnant?
GLP-1 medications (Ozempic, Wegovy, Mounjaro, Zepbound) are not approved for use during pregnancy. Because these drugs have very long half-lives (Semaglutide has a half-life of about 5 days), they can persist in the body for weeks after the last injection. The primary concern is the risk of teratogenicity—potential developmental issues for the fetus. Stopping the drug before conception ensures the medication is cleared from your system before embryogenesis begins.
What is the recommended "washout period" for GLP-1s?
Most clinicians recommend a washout period of at least 2 months (approximately 8 weeks) before attempting to conceive. This allows for roughly 5-6 half-lives of the drug to pass, reducing the concentration in the bloodstream to negligible levels. For Tirzepatide (Mounjaro/Zepbound), which has a slightly shorter half-life than Semaglutide, the same 2-month window is generally advised for safety.
What happens if I discover I am pregnant while on a GLP-1?
If you discover you are pregnant while taking a GLP-1 agonist, you should stop the medication immediately and contact your healthcare provider. While clinical data in humans is limited, the goal is to minimize exposure. Your doctor will help you transition to a pregnancy-safe management plan for your blood sugar or weight.
Will I regain weight immediately after stopping for pregnancy?
Stopping GLP-1s can lead to a return of appetite and potentially some weight regain. However, this can be mitigated by focusing on a high-protein, whole-foods diet and moderate exercise during the washout period. Many women find that the healthy habits formed during GLP-1 therapy help them manage their weight more effectively during pregnancy.