How many months is 30 weeks pregnant?

30 weeks pregnant puts you in month 7 of pregnancy. Month 7 covers weeks 28 to 31. Providers count in weeks; months are approximate.

How big is the baby at 30 weeks?

At 30 weeks, the baby is about the size of a cabbage, roughly 39.9 cm long and around 1319 g. That is an average; healthy babies vary.

Can you fly at 30 weeks pregnant?

In most healthy pregnancies, yes. Occasional flying is almost always safe, and most US airlines let you fly until about 36 weeks. Rules for international flights can be stricter. After 28 weeks, many airlines ask for a letter from your doctor or midwife confirming your due date and that you're well, so check the airline's policy before booking. On flights over 4 hours, walk around often and drink water to cut the chance of a blood clot. Talk to your provider first if you have any complications.

Can a baby be fully developed at 30 weeks?

Not quite. By 30 weeks, most body systems are well developed, but the lungs may still be immature, and the brain is in a period of fast growth. That's why a baby born now is looked after in a neonatal unit. The outlook is very good, though. In England, 97.5% of babies born at 30 weeks and treated in a neonatal unit survived to discharge, based on data from 2008 to 2014. The earlier a baby is born, the more vulnerable it is, so every week of growth inside still counts.

Which position is the baby in at 30 weeks?

At 30 weeks, some babies are already head-down, while others are bottom-first or lying across the womb. All of these are normal for now. Lots of babies lie sideways earlier on, and most get themselves head-down before labour. Your provider can often tell the position by feeling your belly, and a scan can confirm it. A baby that is still breech at about 36 weeks may be offered a gentle turn from the outside, called an external cephalic version.

What pain is normal at 30 weeks pregnant?

Some aches are common now. These include backache and leg cramps. Stretching ligaments can cause quick, stabbing pains low on the sides of your bump. Braxton Hicks tightenings come and go, and they fade when you rest or move. Some pain is not normal. That includes tummy pain that is severe or won't stop, and tightenings that come at regular times or get stronger. With a bad headache, pain just under your ribs, or any pain with bleeding, you should also phone your maternity unit or provider right away.

Do any symptoms mean a boy at 30 weeks pregnant?

No. How high or low you carry doesn't show the sex. The shape of your bump depends on your height, your muscles, how many babies you've had and how much you eat. The idea that a heart rate over 140 means a girl has no science behind it. Home kits that claim to test your urine or blood for the sex are hard to use correctly and expensive. If you'd like to know, ask at a scan, or check your cell-free DNA results if you had that test.

30 Weeks Pregnant

At 30 weeks pregnant, you're three-quarters of the way through. Your baby is close to 39.9 cm from head to heel, which makes it about cabbage-sized. Its eyes can now focus. The brain is growing quickly, and the baby can now help control its own body heat. For you, stairs may leave you out of breath, and sleep is often broken by unsettling dreams or trips to the toilet. This page covers what a 30-week ultrasound shows, your bump, which way your baby is lying, normal and worrying pains, flying at 30 weeks, and boy-or-girl myths.

What trimester is 30 weeks?

Week 30 is in the third trimester, which runs from week 28 until birth. A due date is set at 40 weeks, 10 weeks from now.

Week 30 — third trimester, month 7; 10 weeks to go until your due date.
Baby's size — about a cabbage, ~39.9 cm.

Not sure it's 30 weeks? Try our due date calculator.

How big is your baby at 30 weeks?

Size of a

cabbage

Length, head to heel

~39.9 cm

Weight

~1319 g

Up from a butternut squash last week to a cabbage now.

Baby development at week 30

The fetus's eyesight continues to develop, though vision will stay blurry for a while after birth. The soft lanugo hair starts to disappear as the brain takes over temperature regulation. Bone marrow is now making red blood cells. The fetus is getting plumper and stronger. About the size of a cabbage.

What an ultrasound shows at 30 weeks

A scan at 30 weeks isn't part of routine care, so if you have one, there's usually a reason. If you have bleeding, a quick scan can check the baby's heartbeat and whether the placenta is lying too low. Scans are also used to check growth when your bump measures off, and to confirm how the baby is lying.

On screen, you may see the baby's breathing movements, the heartbeat, and plenty of stretching and kicking. The heart now beats at around 140 times a minute, slower than the 170 or so of the first trimester, and it will slow to about 130 by birth. If the baby's position allows a clear view, the sex may be visible, but a sonographer can never be 100% sure.

Your body at 30 weeks

Mood shifts and fatigue
Heartburn
Trouble sleeping
Braxton Hicks contractions becoming more noticeable

Your belly at 30 weeks

Fundal height is how far it is, in centimetres, from your pubic bone to the highest point of your uterus. At 30 weeks it is usually around 30 cm, and 28 to 32 cm counts as normal. The top of the uterus is now well above your belly button. It will keep climbing toward your breastbone until around 36 weeks.

As your uterus grows upwards, it presses on your stomach and lungs. That's why heartburn and getting out of breath on the stairs are so common now. For heartburn, it can help to eat small meals more often, sit up straight while you eat and after, and leave about 3 hours between your last meal and bedtime. Breathing often gets a little easier near the end, when the baby drops lower into your pelvis.

Tips for week 30

Distinguish Braxton Hicks (irregular, painless) from true labour (regular, intensifying)
Keep up gentle movement for circulation and mood
Start preparing your hospital bag list

30 Weeks Pregnant: your questions

What trimester is 30 weeks?: Week 30 is in the third trimester, which runs from week 28 until birth. A due date is set at 40 weeks, 10 weeks from now.
How many months is 30 weeks pregnant?: 30 weeks pregnant puts you in month 7 of pregnancy. Month 7 covers weeks 28 to 31. Providers count in weeks; months are approximate.
How big is the baby at 30 weeks?: At 30 weeks, the baby is about the size of a cabbage, roughly 39.9 cm long and around 1319 g. That is an average; healthy babies vary.
Can you fly at 30 weeks pregnant?: In most healthy pregnancies, yes. Occasional flying is almost always safe, and most US airlines let you fly until about 36 weeks. Rules for international flights can be stricter. After 28 weeks, many airlines ask for a letter from your doctor or midwife confirming your due date and that you're well, so check the airline's policy before booking. On flights over 4 hours, walk around often and drink water to cut the chance of a blood clot. Talk to your provider first if you have any complications.
Can a baby be fully developed at 30 weeks?: Not quite. By 30 weeks, most body systems are well developed, but the lungs may still be immature, and the brain is in a period of fast growth. That's why a baby born now is looked after in a neonatal unit. The outlook is very good, though. In England, 97.5% of babies born at 30 weeks and treated in a neonatal unit survived to discharge, based on data from 2008 to 2014. The earlier a baby is born, the more vulnerable it is, so every week of growth inside still counts.
Which position is the baby in at 30 weeks?: At 30 weeks, some babies are already head-down, while others are bottom-first or lying across the womb. All of these are normal for now. Lots of babies lie sideways earlier on, and most get themselves head-down before labour. Your provider can often tell the position by feeling your belly, and a scan can confirm it. A baby that is still breech at about 36 weeks may be offered a gentle turn from the outside, called an external cephalic version.
What pain is normal at 30 weeks pregnant?: Some aches are common now. These include backache and leg cramps. Stretching ligaments can cause quick, stabbing pains low on the sides of your bump. Braxton Hicks tightenings come and go, and they fade when you rest or move. Some pain is not normal. That includes tummy pain that is severe or won't stop, and tightenings that come at regular times or get stronger. With a bad headache, pain just under your ribs, or any pain with bleeding, you should also phone your maternity unit or provider right away.
Do any symptoms mean a boy at 30 weeks pregnant?: No. How high or low you carry doesn't show the sex. The shape of your bump depends on your height, your muscles, how many babies you've had and how much you eat. The idea that a heart rate over 140 means a girl has no science behind it. Home kits that claim to test your urine or blood for the sex are hard to use correctly and expensive. If you'd like to know, ask at a scan, or check your cell-free DNA results if you had that test.

Useful at week 30

Flying while pregnant — airline cut-offs, letters and blood-clot tips
Is Pepcid safe in pregnancy? — a heartburn medicine to ask your provider about
Fetal viability — survival odds at each week of pregnancy
Baby gender predictor — a just-for-fun guess, not a real test
Pregnancy weeks to months — 30 weeks is still month 7 — the full chart

← 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.