# 29 Weeks Pregnant: Baby Size, Symptoms & What to Expect | Clever Mum > 29 weeks pregnant — your baby is the size of a butternut squash. What's developing, what you might feel, and what to focus on this week. * [ Home ](/) * › [ Pregnancy ](/pregnancy/) * › [ Week by week ](/pregnancy/week/) * › Week 29 Third trimester # 29 weeks pregnant Your baby is about the size of a butternut squash [ CP ](/authors/parenting-desk/) By [ Clever Mum Parenting ](/authors/parenting-desk/) · Parenting guides Published 11 July 2026 Quick answer — What happens at 29 weeks pregnant? At 29 weeks pregnant, your baby is about the size of a butternut squash, roughly 38.6cm and around 1150g. The baby's muscles and lungs are maturing, and their head is growing to accommodate the developing brain. Who should skip this Skip this page if you need personal medical advice — it is general NHS-aligned information, not a substitute for your midwife. If your baby's movements slow or change, call your maternity unit, not a website. ## How big is the baby at 29 weeks pregnant? At 29 weeks pregnant, your baby is about the size of a butternut squash, roughly 38.6cm and around 1150g. The baby's muscles and lungs are maturing, and their head is growing to accommodate the developing brain. They're getting stronger — kicks and jabs can be quite forceful now. These are typical averages — your midwife's measurements are the ones that matter for your pregnancy. ## What might you feel at 29 weeks? Most people at 29 weeks notice some mix of the symptoms below — and plenty notice none of them. You may feel out of breath more easily as the uterus presses on your lungs and stomach. Constipation and heartburn are common; eating smaller meals helps. None of this is a diagnosis; contact your midwife if something worries you. ### Common symptoms this week * Breathlessness * Constipation and heartburn * Forceful kicks * Warm, disturbed nights Symptom lists are typical, never exhaustive — and having none of them is normal too. ## What should you do at 29 weeks pregnant? The useful job this week is practical, not medical. Keep iron levels up — the baby draws heavily on your stores in the third trimester. Ask about your latest blood test results. Pair it with the NHS week-by-week guide if you want a second description of the same stage. ### Week 29 checklist * Check your recent blood results and ask about iron if you're flagging * Eat smaller, more frequent meals to manage heartburn ## What else is useful at 29 weeks? Use the week page for size and symptoms; use the guides below for the decisions that actually sit in this window — pay, packing, car seats, labour signs. * [Due date calculator](/tools/due-date-calculator/) * [Trimester to-do list](/pregnancy/pregnancy-to-do-list-by-trimester/) * [Maternity leave and pay](/pregnancy/maternity-leave-and-pay-uk/) * [Best infant car seats](/best/best-car-seats-uk/) * [Hospital bag checklist](/pregnancy/hospital-bag-checklist-uk/) ## 29 weeks pregnant: common questions Is it safe to take iron supplements in pregnancy? Yes, when prescribed — anaemia is common in the third trimester as the baby draws on your stores, and your 28-week bloods check for it. Take prescribed iron with orange juice (vitamin C aids absorption), away from tea and coffee, and expect it to darken stools and sometimes constipate. How big is my baby at 29 weeks pregnant? At 29 weeks, your baby is approximately the size of a butternut squash, about 38.6cm and around 1150g. These are approximate averages — every baby grows at its own pace. What's happening at 29 weeks pregnant? The baby's muscles and lungs are maturing, and their head is growing to accommodate the developing brain. They're getting stronger — kicks and jabs can be quite forceful now. For you: you may feel out of breath more easily as the uterus presses on your lungs and stomach. constipation and heartburn are common; eating smaller meals helps. Which trimester is 29 weeks? 29 weeks pregnant is in the third trimester. The first trimester runs to the end of week 12, the second from weeks 13 to 26, and the third from week 27 to birth. ## Sources & further reading * [ You and your baby at 4 to 40 weeks pregnant ](https://www.nhs.uk/pregnancy/week-by-week/) — NHS * [ Your baby's movements ](https://www.nhs.uk/pregnancy/keeping-well/your-babys-movements/) — NHS [← 28 weeks](/pregnancy/week/28/) [All weeks](/pregnancy/week/) [30 weeks →](/pregnancy/week/30/) This is general information, not medical advice — every pregnancy is different. For anything that worries you, and for all your antenatal care, speak to your midwife or GP. If your baby's movements ever slow down or change, contact your maternity unit immediately, day or night. Reviewed August 2026. ## Week 29 at a glance Trimester Third trimester Baby size butternut squash Approx length ~38.6cm Approx weight ~1150g Weeks to go 11 (to 40) Work out your dates Not sure how many weeks you are? Our [due date calculator](/tools/due-date-calculator/) maps your weeks and trimester dates from your last period.