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15 Weeks Pregnant: Your Baby, Your Body and What to Do
Your baby's bones are hardening, and the first tiny movements may soon be felt.
Before you use this guide: Pregnancy weeks are counted from the first day of your last period. Sizes are rough averages, and healthy babies vary. This is general information, not an individual medical assessment, so please confirm personal health decisions with your doctor or midwife.
How your baby is growing
Your baby's bones continue to harden, and the legs are now longer than the arms. Scalp hair patterns are forming. Your baby may already sense light through the closed eyelids and can move the eyes slowly.
Your baby is moving a lot, flexing, kicking and stretching, and may even suck a thumb. If this is not your first pregnancy, you may start to feel flutters in the coming weeks.
How you may be feeling
You might have achy legs, swelling, mild backache or headaches. Some people find their hair thicker and their skin glowing, while others get spots or darker patches. Your appetite may be bigger, and your breasts may feel heavier or start to leak a little.
Your to-do list for week 15
- Choose supportive shoes and avoid standing still for long periods to reduce leg swelling.
- Drink plenty of water and stretch your calves before bed to help reduce cramps.
- Put antenatal classes and appointments in your diary.
- If you work, ask about any adjustments you may need as your body changes.
When to ask for help
A calf that is painful, hot, red and swollen on one side could be a blood clot. Pregnancy raises the risk of clots, so seek urgent medical advice straight away.
For heavy bleeding, severe pain, fluid leaking, a severe headache with vision changes, or a baby who is moving less than usual, do not wait for your next appointment. Contact your midwife, doctor or maternity unit straight away. Our guide to pregnancy warning signs has more detail.
Not sure which week you are in? Use the due-date calculator to estimate your due date and current week.
Useful at this stage: pregnancy weight gain calculator.
Trusted resources to read next
These public health resources provide additional information. Guidance can vary by country, so prioritise advice from your own care team and local health service.
- NHS: Pregnancy — Pregnancy care, common symptoms, screening and complications.
- NHS: Week-by-week pregnancy guide — Pregnancy development and care by week.
This content is for general information only and is not medical advice. Every pregnancy and every baby is different. Always talk to your doctor, midwife or paediatrician about your own situation, and seek urgent care if you are worried.