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35 Weeks Pregnant

At 35 weeks pregnant, your baby measures about 46.2 cm head to heel, similar in size to a honeydew melon, and will weigh around 2.5 kg over the next couple of weeks. From here, babies keep gaining weight but don't get much longer. The heart and blood vessels are complete. The brain is still growing and weighs only about two-thirds of what it will at birth. You may notice yellow spots of colostrum in your bra, and sore ribs from kicks. This page covers group B strep testing, your bump, whether 35 weeks is safe for birth, what to avoid now, nausea and diarrhoea, and signs that need a call.

What trimester is 35 weeks?

Week 35 is in the third trimester, which runs from week 28 until birth. A due date is set at 40 weeks, 5 weeks from now.

  • Week 35 — third trimester, month 8; 5 weeks to go until your due date.
  • Baby's size — about a honeydew melon, ~46.2 cm.

Not sure it's 35 weeks? Try our due date calculator.

How big is your baby at 35 weeks?

Size of a

honeydew melon

Length, head to heel

~46.2 cm

Weight

~2383 g

Up from a cantaloupe last week to a honeydew melon now.

Baby development at week 35

The fetus is gaining weight quickly, and most of the physical development is complete. Space is tighter, so movements may feel different, with more rolls and squirms, but they should not slow down or stop. The fetus is getting into its birth position. About the size of a honeydew melon.

When is the group B strep test?

Group B strep is a common germ that usually lives in the bottom or vagina without causing symptoms. Between 10% and 30% of pregnant women carry it. It rarely causes problems for you. But there is a small chance it passes to your baby during labour and makes them seriously ill.

In the US, everyone is advised to have the test between 36 weeks and 37 weeks 6 days. For most people, that means in the next week or two. One swab is taken from the lower vagina, then from the rectum, with no speculum. A positive result means you get antibiotics into a vein during labour. This greatly lowers the chance that your baby gets ill. If your baby comes before 37 weeks and there's no result yet, antibiotics are usually given anyway.

The UK is different. The NHS doesn't test routinely, because the germ is so common and a test can't predict which babies will get ill. It may be found by chance on a urine test or swab done for another reason. The NHS puts the chance of it spreading to the baby and making them ill at about 1 in 1,750 pregnancies. Wherever you live, tell your team if a previous baby had group B strep.

Your body at 35 weeks

  • Strong pressure low in the pelvis
  • More frequent urination
  • Trouble sleeping
  • Braxton Hicks contractions increasing

Your belly at 35 weeks

At 35 weeks, your bump usually measures around 33 to 37 cm. The top of your womb is close to its highest point and will reach your breastbone at about 36 weeks. After that, the measurement may go down as the baby moves down into your pelvis.

Sore ribs are common now, often because a head-down baby is kicking up high. Pain that is severe or sits just under your ribs, especially on the right, needs checking, since it can point to pre-eclampsia. Lower down, you may feel pressure in your pelvis and brief, sharp jolts in the vagina as the baby's head presses on your cervix.

Tips for week 35

  • Group B strep testing usually happens around weeks 36–37
  • Rest often; the final weeks are tiring
  • Have your hospital bag ready by now

35 Weeks Pregnant: your questions

What trimester is 35 weeks?
Week 35 is in the third trimester, which runs from week 28 until birth. A due date is set at 40 weeks, 5 weeks from now.
How many months is 35 weeks pregnant?
35 weeks pregnant puts you in month 8 of pregnancy. Week 35 is the last week of that month, and month 9 starts at week 36. Providers count in weeks; months are approximate.
How big is the baby at 35 weeks?
At 35 weeks, the baby is about the size of a honeydew melon, roughly 46.2 cm long and around 2383 g. That is an average; healthy babies vary.
Is 35 weeks safe to deliver?
A baby born at 35 weeks usually has a good outlook, but it's still early. Birth at 34 to 36 weeks is called late preterm. These babies can have many of the same problems as other preterm babies, such as trouble breathing, feeding, staying warm, and jaundice. Only about 1.9% of US births happen during week 35. Without a medical reason, such as pre-eclampsia, doctors wait until at least 39 weeks for a planned birth. If your baby does come now, the team will watch closely and help with feeding and breathing if needed.
What should I avoid at 35 weeks pregnant?
Alcohol and smoking are still off the list, and caffeine should stay below 200 mg daily. Fall asleep lying on your side rather than on your back, and don't lift heavy things. Long car journeys are best avoided, and most US airlines stop domestic flights at about 36 weeks. Don't use a home heartbeat monitor to check on your baby. If movements change, call your maternity unit instead. And don't brush off warning signs because your due date is close: call about bleeding, leaking fluid or regular tightenings.
Is cramping normal at 35 weeks pregnant?
Some cramping is common. Braxton Hicks tend to come more often toward the end of pregnancy, and they can feel like mild period pain. They should stay irregular and not build up. Period-type pains that keep coming back, tightenings every 10 minutes or more often, or a new backache can mean labour is starting, which is still early at 35 weeks. Phone your maternity unit or provider about these. If your waters break, call at once. For anyone who carries group B strep, waters breaking between 34 and 37 weeks means you'll be offered induction or a caesarean without delay.
Is nausea or diarrhoea normal at 35 weeks pregnant?
It can happen for everyday reasons. A stomach bug or food poisoning is the most common cause of diarrhoea and vomiting, and some people still have morning sickness late in pregnancy. Sip fluids so you don't get dehydrated. Some causes need checking, though. Vomiting, or heartburn that medicine doesn't help, can be a sign of pre-eclampsia, especially with a headache, vision changes or swelling. Loose stools with cramps or a low backache may mean early labour. Phone your provider if you can't keep drinks down or you're worried.
What symptoms should I not ignore at 35 weeks pregnant?
Get help the same day for a severe headache that doesn't ease with paracetamol, especially with blurred vision, flashing lights, pain under the ribs or sudden swelling. These can be signs of pre-eclampsia. Phone at once if you bleed, your waters break, or the baby moves less. After your waters break, a high temperature, feeling shivery, or fluid that looks green or smells bad can mean infection. Very itchy palms or soles also need checking. Milder headaches are common, and paracetamol is the usual first choice.

Useful at week 35

← All weeks: the full pregnancy week-by-week guide

Sources

Checked against the following public guidance on October 2, 2026. Advice can differ between countries; your doctor, nurse or midwife can apply it to you.