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Can you take Daratumumab Injection while pregnant?

Updated Sep 7, 20262 min readAnswer
On this pageShort answer Pregnancy and daratumumab: what to know Common questions Related questions Sources
Short answer

**No, daratumumab injection is not recommended during pregnancy unless your cancer team decides the benefit to you clearly outweighs the risk to the baby.**

Daratumumab is an antibody that crosses the placenta, and antibodies of this type can reduce a baby's immune cells before birth. Because of that, pregnancy is confirmed as negative before treatment starts, and effective birth control is advised during treatment and for 3 months after the last dose. The picture also depends on what daratumumab is combined with, since lenalidomide, thalidomide, and pomalidomide cause serious birth defects and carry their own pregnancy prevention requirements. If you are pregnant, think you may be, or want to conceive later, that is a conversation for your oncologist and an obstetrician together, not a decision to make by skipping infusions. Keep a written list of every drug in your regimen so any clinician you see knows exactly what you are on.

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Pregnancy and daratumumab: what to know

1Confirm before you start:Expect a pregnancy test before the first dose and agree on a birth control plan with your care team.
2Cover the full window:Use effective contraception during treatment and for 3 months after your last daratumumab dose.
3Check the whole regimen:Ask which other drugs you take with daratumumab, since lenalidomide, thalidomide, and pomalidomide have separate pregnancy rules.
4Report a positive test fast:Call your oncologist the same day if you become pregnant, and keep your appointments while the plan is reviewed.
5Plan fertility early:Raise future pregnancy goals before treatment starts so options can be discussed while there is still time.
6Flag exposure at delivery:Tell the pediatric team about in-utero exposure so newborn immune counts and live vaccine timing can be checked.

Common questions

Can you take Daratumumab Injection while pregnant?

Daratumumab is an antibody that crosses the placenta and can lower a baby's immune cells, so it is not recommended in pregnancy. Your team will confirm you are not pregnant before you start and ask you to use effective birth control during treatment and for 3 months after the last dose. It is often given with lenalidomide, thalidomide, or pomalidomide, which cause serious birth defects and have strict pregnancy prevention programs. If you are pregnant or planning a pregnancy, tell your oncologist right away instead of stopping doses on your own. Babies exposed before birth may need live vaccines delayed until blood counts are checked.

About this page. Written and maintained by the Pymander Health team. Last updated September 7, 2026.

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