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Pregnancy · contraception · FDA labels

GLP-1s, pregnancy and birth control

Weight-loss labels say to stop Wegovy, Zepbound or Saxenda when pregnancy is recognized. Ozempic and Mounjaro use different wording because poorly controlled diabetes also carries pregnancy risks. Semaglutide adds a two-month planned-pregnancy clock. Tirzepatide adds a separate four-week birth-control-pill instruction after starting and every dose increase.

Source: Five FDA-approved product labels, read 2026-08-16

What matters first

Labels read
5
Weight-loss labels
Stop when pregnancy is recognized
Semaglutide planning window
2 months
Tirzepatide pill instruction
4 weeks after starting and each increase

Do not mix these up

Two instructions use different clocks

2 months

Before a planned pregnancy

Current Wegovy and Ozempic labels say to stop semaglutide at least two months before a planned pregnancy. The labels tie that time to how long semaglutide stays in the body.

4 weeks

After starting or raising tirzepatide

Current Zepbound and Mounjaro labels say to switch from an oral hormonal contraceptive or add a barrier method for 4 weeks after starting and for 4 weeks after each dose increase.

Label comparison

What each product label actually says

The approved use matters. A weight-loss label can say to stop for pregnancy. A diabetes label must also cover the known risks of poorly controlled diabetes. That is why one rule for the whole drug class would be misleading.

Wegovy

semaglutide · weight management

FDA label
If pregnancy is recognized
For weight loss, the label says to stop when pregnancy is recognized.
Before a planned pregnancy
Stop at least 2 months before a planned pregnancy because semaglutide remains in the body for a long time.

Ozempic

semaglutide · type 2 diabetes

FDA label
If pregnancy is recognized
The label says to use it in pregnancy only when the possible benefit is worth the possible fetal risk. It also covers risks from poorly controlled diabetes.
Before a planned pregnancy
Stop at least 2 months before a planned pregnancy because semaglutide has a long washout period.

Zepbound

tirzepatide · weight management

FDA label
If pregnancy is recognized
Weight loss offers no benefit during pregnancy. The label says to stop when pregnancy is recognized.
Before a planned pregnancy
The current label does not state a fixed waiting interval.

Mounjaro

tirzepatide · type 2 diabetes

FDA label
If pregnancy is recognized
The label says to use it in pregnancy only when the possible benefit is worth the possible fetal risk. It also covers risks from poorly controlled diabetes.
Before a planned pregnancy
The current label does not state a fixed waiting interval.

Saxenda

liraglutide · weight management

FDA label
If pregnancy is recognized
Weight loss offers no benefit during pregnancy. The label says to stop when pregnancy is recognized.
Before a planned pregnancy
The current label does not state a fixed waiting interval.

Tirzepatide only

Why birth control pills get a separate instruction

Tirzepatide delays stomach emptying. Its labels say this may reduce how well oral hormonal contraceptives work. The effect is largest after the first dose and fades over time, which is why the instruction returns after each dose increase.

Zepbound

Switch to a non-oral method or add a barrier method for 4 weeks after starting Zepbound and for 4 weeks after each dose increase.

Non-oral boundary: The label says hormonal contraceptives that are not taken by mouth should not be affected.

Mounjaro

Switch to a non-oral method or add a barrier method for 4 weeks after starting Mounjaro and for 4 weeks after each dose increase.

Non-oral boundary: The label says hormonal contraceptives that are not taken by mouth should not be affected.

What this does not show

This does not prove a fertility benefit

A label instruction is not proof that a GLP-1 drug improves or reduces fertility. Weight change, cycle changes and online pregnancy stories cannot establish a fertility benefit.

The labels also cannot decide what one person should do with treatment for diabetes or another condition. A prescriber can weigh that condition against the pregnancy wording.

Continue with the connected record

What happens when you stopRead the semaglutide washout and stopping evidence.GLP-1 interactionsSee the broader delayed-stomach-emptying interaction record.Semaglutide ledgerOpen the molecule behind Wegovy and Ozempic.Tirzepatide ledgerOpen the molecule behind Zepbound and Mounjaro.

Review boundary

Medically reviewed by Jennifer Montecillo, MD · non-practicing medical reviewer

Reviewed 2026-08-16

The comparison uses current U.S. product labels. It does not turn a label into personal pregnancy, contraception or diabetes advice.

5primary sources, each with the day we read it — open the documents used on this page