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Second trimester

25 weeks pregnant

At 25 weeks your baby is active, filling out with fat, and may react to loud sounds. Some people notice swelling, indigestion or wind as the bump grows. Gestational diabetes screening and, in the UK, a 25-week appointment for first pregnancies are common around now.

This page covers 25 weeks 0 days to 25 weeks 6 days (25+0 to 25+6), counted from the first day of the last period. Check how far along you are

Enter it to see the calendar dates of your week 25.

Botanical illustration of a cauliflower

About the size of a cauliflower

Typical estimated weight 785 g (1 lb 12 oz) at 25+0, about 895 g (2 lb 0 oz) by 25+6. This is the 50th centile; healthy babies commonly vary by about 12.7% either way.1

A reference value, not a measurement of your baby.

How your baby is developing

  • This is an active time. Loud noises may make your baby jump or kick, and you might even feel the occasional hiccup.2
  • Your baby now passes urine into the amniotic fluid, which cushions them and helps keep their temperature steady.2
  • Fat is building up under the skin, so it is starting to look less wrinkled and plumper.3,4
  • The nervous system is maturing quickly, and the bone marrow is making blood cells.3,4

Changes you may notice

Everyone’s experience is different. You may notice some of these, or none.

  • Some puffiness in the face, hands and feet is common and is often harmless water retention. Mention it to your midwife or doctor so they can check your blood pressure for pre-eclampsia.2
  • Contact your provider, midwife or NHS 111 (UK) promptly if you have a severe headache, problems with your vision, or pain just below the ribs, as these can be signs of pre-eclampsia.2
  • Burping, bloating, heartburn and feeling unusually full are common as your growing baby takes up space. Smaller meals, sitting upright to eat and avoiding rich, spicy or fatty food may help.2
  • Other common symptoms around now include tiredness, backache, leg cramps, constipation and round ligament pain at the sides of the bump.2

Care around this week

  • Gestational diabetes screening is usually done between 24 and 28 weeks. In the UK, the glucose tolerance test is offered in this window if you have a higher chance of gestational diabetes.5,6
  • In the UK, an antenatal appointment is usually offered at 25 weeks if this is your first baby.6
  • Learn your baby's usual pattern of movements. If they slow down, stop or change, contact your midwife, provider or maternity unit straight away. Don't wait for the next day.7

Questions to ask your provider

  • Is the swelling I have normal, and could you check my blood pressure?
  • Which pre-eclampsia symptoms should make me call straight away?
  • What can I take for heartburn or indigestion?
  • When is my gestational diabetes screening, and how do I prepare for it?
When to contact your provider straight away

Call 911 (US) or 999 (UK) in an emergency, such as heavy bleeding or bleeding with severe pain, a seizure, chest pain, or severe trouble breathing.8,9,10,11

These symptoms are not always serious, but each one needs prompt advice from your provider, midwife or maternity unit (or NHS 111 in the UK if you cannot reach them) rather than waiting for your next appointment, and it helps to tell them you are pregnant.

  • Vaginal bleeding or spotting at any stage of pregnancy. Call 911 or 999 if the bleeding is heavy or comes with severe belly pain, shoulder pain, or feeling faint or dizzy.10,12
  • Fluid leaking or gushing from your vagina, or discharge that is unusual for you. Get checked straight away if the fluid is greenish, colored or smells bad.10,11,13,14
  • Your baby moving less than usual, not moving, or a change in their usual pattern of movements. Call immediately, even in the middle of the night, and do not use a home Doppler to check yourself.7,10
  • A severe headache that does not go away with simple painkillers or gets worse, or sudden changes in your vision such as blurring or seeing flashing lights.8,10,11
  • Sudden swelling of your face, hands or feet, or swelling, redness or pain in a leg.8,10,11
  • Belly pain that is severe or does not go away after resting, or pain just below the ribs.8,10,15
  • Regular tightenings or contractions, period-type pains, or backache that is unusual for you before 37 weeks, which can be signs of preterm labor.14,15
  • A fever of 100.4°F (38°C) or higher, or feeling hot, cold or shivery.10,11,14
  • Shortness of breath that comes on suddenly or happens when you lie flat, chest pain, a racing or pounding heart, or dizziness or fainting.10,11
  • Very itchy skin, especially on the palms of your hands or soles of your feet, or itching that is worse at night.16
  • Being sick so often that you cannot keep food or drink down, or signs of dehydration such as dark urine, peeing very little, or feeling dizzy.10,17
  • Thoughts of harming yourself or your baby. Get help right away, and call 911 or 999 if you think you might act on them.10,18

Questions about 25 weeks

Can babies get hiccups in the womb at 25 weeks?

Yes. Your baby is very active around this time, and you might feel the occasional hiccup.2

Is swelling normal at 25 weeks pregnant?

Mild swelling of the face, hands and feet is common and often harmless, but tell your midwife or doctor so they can check your blood pressure. Get advice promptly if swelling comes with a severe headache, vision problems or pain just below the ribs.2

Sources

  1. In utero analysis of fetal growth: a sonographic weight standardRadiology 181(1):129–133, 1991
  2. 25 weeks pregnant guideNHS Best Start in Life
  3. Fetal development: stages of growthCleveland Clinic
  4. Fetal developmentUS National Library of Medicine
  5. Practice Bulletin No. 190: Gestational Diabetes MellitusAmerican College of Obstetricians and Gynecologists, 2018
  6. Your antenatal appointmentsNHS (England)
  7. Your baby's movementsNHS (England)
  8. Pre-eclampsiaNHS (England)
  9. Epilepsy and pregnancyNHS (England)
  10. Urgent Maternal Warning Signs and Symptoms (Hear Her campaign)US Centers for Disease Control and Prevention
  11. Pregnancy symptoms you need to get help forNHS (England)
  12. Vaginal bleeding in pregnancyNHS (England)
  13. Signs of going into labourNHS Best Start in Life
  14. Premature labour and birthNHS (England)
  15. Stomach pain in pregnancyNHS (England)
  16. Itching in pregnancyNHS (England)
  17. Severe vomiting in pregnancyNHS (England)
  18. Depression in pregnancyNHS (England)

Links checked November 12, 2026. Citing a source does not mean it endorses this site.

Written from the sources above and checked against them on 2026-11-12. Not reviewed by a clinician. Our editorial policy