Baby is the size ofa coconut
TrimesterThird
MonthMonth 7
Weeks to due date9
👶 Your baby at 31 weeks
- All five senses work.
- The baby turns its head from side to side.
🤰 Your body at 31 weeks
- Braxton Hicks contractions may become more frequent.
✅ To do this week
- Start packing your hospital bag: ID and antenatal reports, comfortable clothes, maternity pads, baby clothes, nappies and a blanket.
🚨 When to call your doctor
- Vaginal bleeding or fluid leaking
- Severe tummy pain or cramping
- Fever over 38 °C
- Severe headache, blurred vision or sudden swelling of face or hands (pre-eclampsia signs)
- Your baby moving less than usual
Find exactly how many weeks and days pregnant you are today, your trimester and your due date.
See your baby's average weight and length for any week of pregnancy (8–42 weeks), the normal weight range, and a size comparison, with a full fetal growth chart.
Find how much weight you should gain in pregnancy — in total and by each week — from your pre-pregnancy weight and height, using the IOM 2009 guidelines, with a week-by-week chart in kg.
Find how many calories you need a day in each trimester of pregnancy, by your weight, height, age and activity, using Indian (ICMR), US (IOM) or UK (NHS) guidelines.
❓ Frequently asked questions
How many months is 31 weeks pregnant?
31 weeks is in month 7 of pregnancy as months are usually counted (about 7.1 calendar months since your last period), in the third trimester.
How big is the baby at 31 weeks?
About the size of a coconut: around 41.1 cm long and 1.75 kg (3.9 lb).
What should I do at 31 weeks pregnant?
Start packing your hospital bag: ID and antenatal reports, comfortable clothes, maternity pads, baby clothes, nappies and a blanket.
🔁 Nearby weeks