Pregnancy Vaccine Schedule

Because the shot is really for your baby. After a Tdap dose, your immune system spends about two weeks building whooping-cough antibodies, which then cross the placenta and accumulate in your baby. Vaccinating at 27–36 weeks — and earlier in that window is better — times the peak transfer so your newborn arrives with the highest possible antibody levels. That matters because whooping cough is most dangerous in the first weeks of life, and babies can't start their own DTaP series until 2 months old. The antibodies you pass on fade within a couple of years, which is why ACIP recommends a fresh Tdap dose in every pregnancy, regardless of when your last one was.

RSV circulates seasonally in most of the continental US, peaking fall through winter. The maternal RSV vaccine (Abrysvo) is given at 32–36 weeks specifically so your baby is born carrying RSV antibodies right as the virus circulates during their first, most vulnerable months — so ACIP recommends administering it September through January in most of the country. A dose timed outside the season would give the baby little when protection matters most. Seasonality is genuinely regional, though: Alaska, southern Florida, Hawaii, and tropical territories follow different calendars, so your provider's local guidance wins. If your 32–36 week stretch misses the season entirely, your baby can get nirsevimab after birth instead.

Usually not — it's one or the other. If you received Abrysvo at least 14 days before delivery, your baby is born with transferred antibodies and generally doesn't need nirsevimab, the RSV antibody injection for infants. Nirsevimab is the pathway when the maternal vaccine wasn't given, was given less than two weeks before birth, or when your 32–36 week window fell outside RSV season. There are exceptions — very premature babies and infants with certain heart or lung conditions may be advised to get nirsevimab regardless — so the final call belongs to your pediatric team. Either route, the goal is the same: RSV protection through the first months, when infant hospitalization risk is highest.

The live-virus vaccines: MMR (measles-mumps-rubella), varicella (chickenpox), and the nasal-spray flu vaccine (LAIV). Because they contain weakened live virus, they carry a theoretical risk to the fetus and are not given during pregnancy — catch up before conceiving (then wait about a month before trying) or right after delivery, which is when many hospitals offer them. The injected flu shot is inactivated and is the one recommended in pregnancy. Rubella and chickenpox immunity are checked on your first prenatal labs, so if you're non-immune you'll be flagged for postpartum vaccination. If you received a live vaccine before you knew you were pregnant, tell your provider — it's a conversation, not a cause for panic.

Yes. The injected, inactivated flu vaccine has been recommended in pregnancy for decades, in any trimester, with a long safety record across millions of pregnancies. It earns its place on this schedule twice over: pregnancy itself raises your risk of severe flu complications, because of changes to your immune system, heart, and lungs — and the antibodies you make cross the placenta and protect your baby for roughly their first six months, before they're old enough for their own flu vaccine. If you're pregnant during the fall, aim to be vaccinated by the end of October, ahead of the seasonal peak. Just make sure it's the shot, not the nasal spray — the spray is a live vaccine.

Yes. This planner runs entirely in your browser: the dates you enter are used on your own device to compute your windows and are never sent to a server, saved, or shared — close the tab and they're gone. We treat reproductive health data as sensitive by default, especially post-Dobbs, which is why the tool has no accounts, no tracking of your inputs, and no storage. The output is an educational schedule built from published CDC/ACIP and ACOG guidance; it isn't medical advice, and your prenatal team makes the actual calls — including any local seasonal adjustments.