Third trimester
29 weeks pregnant
Baby is about the size of a butternut squash.
Week 29 of 40 · in your third trimester · Updated
Your baby this week
Bones are fully formed but still soft. Lots of growing to do.
- Baby's bones are now fully formed but soft and pliable.
- Baby is starting to lay down fat to keep warm after birth.
- Baby's head will start moving down toward the pelvis in coming weeks.
Your body this week
Fatigue may return. Listen to your body and nap when you can.
- Total weight gain so far is typically 19–25 lbs (8.6–11.3 kg) — varies widely and that's normal.
- Fatigue is back as your body's energy demand increases.
- Stretch marks may keep appearing — they fade after birth.
Common symptoms
- Returning fatigue
- Pelvic pressure
- Indigestion
- Hot flashes
- Stretch marks
Things to do this week
- Nap when you can
- Wear loose, breathable clothing
- Hospital tour and pre-registration if possible
For partners this week
Take the errands
- Fatigue is back — take over errands and grocery runs.
- Help with hospital pre-registration if your hospital offers it.
Typical visits around this week
Based on a typical schedule in Ontario. Your doctor or midwife sets the actual timing.
Rh immune globulin (if you're Rh negative)
Weeks 27–29 · if it applies to you
Your Rh blood type is checked in early bloodwork. If you're Rh negative, you'll usually be offered an Rh immune globulin injection at about 28 weeks, and sometimes at other times too (for example after bleeding or after birth). Your provider will explain whether you need it.
Questions to ask →Questions to ask ↑
- What is my blood type and Rh factor?
- Do I need the Rh immune globulin shot, and when?
- Should I call you if I have any bleeding before then?
- Will I need it again after the baby is born?
Tdap (whooping cough) vaccine
Weeks 27–32
Recommended in every pregnancy, whatever your vaccine history, ideally between 27 and 32 weeks. It helps protect the baby from whooping cough in the first months of life. If it's missed, it can still be given later in pregnancy.
Questions to ask →Questions to ask ↑
- Can I get the Tdap vaccine at this visit, or where should I go?
- I had it in a past pregnancy — do I need it again?
- Can I get other vaccines at the same time?
Routine check-ups (about every 2 weeks)
Weeks 28–36
From about 28 weeks, check-ups usually come every 2 to 3 weeks. Your provider keeps an eye on your blood pressure, the baby's growth and heartbeat, and will talk about feeling the baby move.
Questions to ask →Questions to ask ↑
- How should I keep track of the baby's movements?
- Which symptoms mean I should call right away?
- When should we register at the hospital or plan our birth place?
- Are prenatal classes available near us?
Coming up
RSV vaccine (if baby is due in RSV season)
Weeks 32–36 · if it applies to you
If your baby is expected during RSV season (roughly fall to spring), a vaccine in pregnancy is one way to protect them; the other is an antibody given to the baby after birth. Ontario offers the pregnancy vaccine free at 32–36 weeks (national guidance says it can be given from 28 weeks). Your provider will help you choose.
Questions to ask →Questions to ask ↑
- Is my baby due during RSV season?
- Should I get the vaccine, or should the baby get the antibody after birth?
- Where can I get the RSV vaccine?
- If I get it, does the baby still need anything after birth?
A flu shot and a COVID-19 vaccine are recommended at any stage of pregnancy. The flu shot is given during flu season, so the timing depends on when you're pregnant.
When to call your doctor or midwife
Bleeding, fluid leaking, a bad headache or vision changes, or baby moving less than usual all need a call. See the warning signs and who to call →
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Further reading from health authorities
- Pregnancy — Government of Canada (Public Health Agency of Canada)
- Your pregnancy — Pregnancy Info, from the Society of Obstetricians and Gynaecologists of Canada (SOGC)
- Week-by-week guide to pregnancy — NHS (UK)
- Pregnancy — American College of Obstetricians and Gynecologists (ACOG)