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Day 227 of 280 · 32 weeks + 3 days

The RSV shot, this week or soon

Last reviewed · 2 min read · 8 sources · Plain-text version

Thirty-two weeks and three days. The window for the pregnancy RSV vaccine runs from 32 weeks to the end of week 36. If you decided yes, today you book it.

Size this week
about the length of a bunch of celery
Length this week
around 42.4 cm from head to heel
A Latina woman with a full bump in a cardigan at a pharmacy counter, talking with a smiling pharmacist in a white coat, a paper diary open on the counter, bright daylight.

Thirty-two weeks and three days. A couple of weeks ago you looked at the RSV vaccine and made a decision with your provider. If the answer was yes, the window is open now, and today's job is a phone call.

Your baby

A single bunch of celery with its leaves on a plain pale wooden table, soft window light.

The Office on Women's Health puts a baby at 32 weeks at about 15 to 17 inches long and 4 to 4½ pounds, gaining roughly half a pound a week (OWH). The NHS measures them at around 42.4cm from head to heel this week (NHS).

The point of the vaccine is the months after birth. If your baby will be born during RSV season, the AAP says the vaccine given to you in pregnancy protects them for 6 months (AAP).

Your body

The CDC's guidance for providers is specific: one dose of Abrysvo, given from 32 weeks 0 days through 36 weeks 6 days, seasonally from September through January in most of the continental US (CDC). Abrysvo is the only RSV vaccine used in pregnancy; the others, Arexvy and mResvia, should not be given during pregnancy (CDC). Alaska, Puerto Rico, and other places with a different RSV season follow their own local timing (CDC).

Try today

  1. The RSV appointment

    Time: 10 minutes

    1. Find what you wrote down about RSV a couple of weeks ago. If the answer was yes and your dates fall in the season, carry on.

    2. Call your clinic or pharmacy and book a date between now and 36 weeks 6 days (CDC). Sooner is better than later: babies born less than 14 days after the dose need nirsevimab (Beyfortus) (AAP).

    3. When you book, ask them to confirm it's Abrysvo, the pregnancy vaccine (CDC).

    4. Put the date in both your calendars and on your vaccine checklist.

    Make it work:

    If you had an RSV vaccine in a previous pregnancy, you shouldn't get another dose; your baby should get nirsevimab instead (CDC). Tell whoever books you.

Watch for

  • Normal

    tired eyes by evening.

    Call your provider

    for vision changes or blind spots (MedlinePlus).

  • Normal

    itchy skin as your belly stretches; about 20 percent of pregnant women feel itchy (OWH).

    Call your provider

    for persistent itching without a rash, which may be a sign of cholestasis (MedlinePlus).

  • Normal

    getting breathless on the stairs, a common third-trimester complaint (OWH).

    Call your provider

    right away for trouble breathing, which is on the CDC's urgent warning list (CDC).

For you

If your answer was no, or your dates don't fit the season, you haven't missed something. That's a decision you made with your provider, and this card isn't for you.

If you haven't had Tdap yet this pregnancy, its best window is 27 to 36 weeks (CDC), which overlaps this one. Ask whether both can be sorted at the same visit. One trip is easier than two.

Sources

This guide is general education that summarizes published research and guidance from groups like the American Academy of Pediatrics, the CDC, and the WHO. It isn’t medical advice, and every child develops on their own timeline. Your pediatrician knows your child; if something feels wrong, call them. In an emergency, call 911.

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