Plan B and pregnancy: what we know
Pregnancy and breastfeeding are special periods where every medication choice deserves careful review. Plan B (Levonorgestrel) is no exception. The prescribing information for Levonorgestrel provides specific guidance, and the right decision depends on the indication, alternatives, gestational stage and the woman's overall medical picture.
Pregnancy safety data for Plan B
According to the prescribing information for Levonorgestrel, the available human data in pregnancy may be limited, supportive, or restrictive depending on the molecule. Some Hormones and Birth Control agents are routinely used in pregnancy when needed; others are avoided. The risk-benefit calculation includes the importance of treating the underlying condition and the consequences of leaving it untreated.
Breastfeeding considerations
Breastfeeding considerations are usually separate from pregnancy considerations. Some active ingredients pass into breast milk in negligible amounts; others are present at levels that warrant caution. Plan B's primary mechanism is delaying or preventing ovulation when taken before the LH surge. The prescriber weighs the benefit of breastfeeding, the importance of Plan B, and the availability of alternative therapies.
Frequently asked questions
Can I take Plan B during pregnancy? ▾
Whether Plan B can be taken in pregnancy depends on the active ingredient Levonorgestrel, the indication and the gestational stage. The prescribing information should be consulted, and any pregnancy or planned pregnancy should be discussed with the prescriber before starting or continuing Plan B at 1.5mg.
Will Plan B affect my baby? ▾
Effects on the fetus or breastfed infant depend on whether the active ingredient Levonorgestrel crosses the placenta or enters breast milk and at what concentrations. Most decisions are individualised; some women continue Plan B during pregnancy when benefits clearly outweigh known risks, others switch.
More on Plan B
- With alcoholPlan B and alcohol — is it safe to drink?
- With foodShould Plan B be taken with food?
- Side effectsPlan B side effects: common, rare and warning signs
- Dosage guidePlan B dosage guide: how much to take and when
- OnsetHow fast does Plan B start working?
- DurationHow long does Plan B last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.