Pregnancy vaccination schedule calculator

Two of these three are for the baby, not for you

It is easy to read the pregnancy vaccination list as a set of precautions for the pregnant person. Two of the three are not. The whooping cough and RSV vaccines are given to you so that antibodies cross the placenta and protect the baby in the weeks after birth, before they have any immunity of their own.

That is why the timing is specific in a way that most adult vaccination is not. A flu jab works whenever you have it. A whooping cough jab at 34 weeks does less for the baby than the same jab at 22 weeks, because the antibodies have had less time to transfer.

Whooping cough: 16 to 32 weeks, and why

UKHSA recommends the whooping cough vaccine from 16 weeks to 32 weeks, with the vaccine available up to 38 weeks if that window is missed. In practice it is usually offered at or just after the 20-week anomaly scan, because that is when you are next standing in front of a maternity service.

The reason for the window is stated plainly in the programme documents: vaccinating between 16 and 32 weeks ensures high levels of antibodies against pertussis cross the placenta to passively protect the baby when it is born. Newborns are most vulnerable to whooping cough in the weeks before their own first immunisations at eight weeks, and that gap is precisely what maternal vaccination is designed to cover.

If you are past 32 weeks, the vaccine is still worth chasing rather than shrugging at. Later is less effective than earlier, but it is not nothing, and the programme explicitly allows for it up to 38 weeks.

RSV: the newest one, and the one nobody has heard of

The maternal RSV programme is recent, and a great many pregnant people have still not been told it exists. RSV is a common cause of coughs and colds that most people catch several times in their life without incident. In babies it is the usual cause of bronchiolitis, which is the single commonest reason for a baby to be admitted to hospital in winter.

The NHS offers the vaccine from 28 weeks of pregnancy and states that having it as soon as possible from 28 weeks gives the best protection for the baby. It can be given later if needed, right up until labour starts. Unlike flu, it is given all year round rather than seasonally, and it is recommended in every pregnancy rather than once.

The protection it buys is time-limited and front-loaded: the aim is to cover roughly the first six months after birth, which is when a baby is most likely to become seriously ill from RSV.

Flu has no window, which is its own kind of trap

The flu vaccine is offered at any stage of pregnancy during the seasonal campaign. Because there is no gestational trigger, nobody's system prompts it, and it is the one most often missed.

Pregnancy changes how the immune system, heart and lungs handle flu, which is why pregnant women are on the clinical risk list regardless of age or underlying health. If your pregnancy runs across an autumn or winter, ask at every appointment rather than waiting to be invited — and remember that your GP surgery can give it even if your maternity service has not mentioned it.

You can have them together

The NHS states explicitly that the RSV vaccine can be given at the same time as other pregnancy vaccines, including whooping cough and flu. For anyone juggling appointments around work, that matters: one visit at around 28 weeks can cover RSV and, if flu season is running, the flu jab too, with whooping cough already done at 20.

If your maternity service does not offer vaccinations directly, your GP surgery will. You do not have to wait for an invitation, and asking is not queue-jumping.

The conversation about safety

Both maternal programmes have been through the ordinary licensing and surveillance processes and both are recommended by the UK's vaccination advisory structures. That is the honest summary, and it is worth saying alongside the equally honest point that no vaccine is offered on the basis that it carries zero risk of any side effect — a sore arm is common, and feeling briefly unwell afterwards is not unusual.

What the programmes are weighing is the risk of the illness against the risk of the vaccine in a specific population at a specific time. Whooping cough in a newborn and bronchiolitis in a two-month-old are both serious, both relatively common, and both concentrated in exactly the window that maternal antibodies cover. If you want to work through that trade-off properly rather than take a summary on trust, the UKHSA leaflet written for pregnant women is the document to ask for, and your midwife can give you a paper copy.

What this page will not tell you

It gives dates. It does not name a product, a formulation or an amount, and it does not know which vaccines are currently in the schedule where you live — the four UK nations run their programmes separately and the detail changes between years, particularly for newer programmes like RSV.

Rubella is worth one closing line, because it comes up here and belongs elsewhere. MMR is a live vaccine and is not given during pregnancy; if a booking blood test shows you are not immune to rubella, the vaccination is offered after the birth rather than during the pregnancy. That is a postnatal conversation, not one to have at 20 weeks.