Week 15 Pregnancy

Second Trimester

Last reviewed: July 2026

15 weeks pregnant at a glance

You are in the second trimester.
Your baby is roughly the size of an apple.
Standard midwife check.
Every pregnancy is different, so don't worry if your experience varies slightly.

You are 15 weeks pregnant and in your second trimester. Your baby is about the size of an apple. This week's key development: Sensing the World. NHS note: Standard midwife check.

This page is for general pregnancy planning and date guidance only. It is not medical advice, diagnosis, or treatment. Pregnancy dates are estimates and can change after a scan or advice from your midwife, GP, or maternity team. Always speak to a qualified healthcare professional if you have symptoms, concerns, or questions about your pregnancy.

Week 14

Week 16

Baby's Development

Your baby is about the size of an apple.

Sensing the World — Your baby is beginning to sense light through still-fused eyelids, and their hearing is developing. They can detect sounds from outside the womb — including your voice, which is already becoming familiar and comforting to them.

Apple

Approx. 10.1cm

Your Symptoms

Occasional nosebleeds
Bleeding gums
Growing appetite

Every pregnancy is different. You may experience all, some, or none of these symptoms — and that's completely normal. If anything concerns you, speak to your midwife.

NHS Appointments

Standard midwife check. They'll listen to the baby's heartbeat with a Doppler for the first time.

Practical Advice for Week 15

Nutrition

Continue vitamin D and a balanced diet.
Include fibre-rich foods to prevent constipation — fruit, veg, and wholegrains.
Iron absorption is helped by vitamin C — have orange juice with iron-rich meals.
Snacking on dried fruit and nuts provides energy between meals.

Exercise

Keep up moderate activity — aim for 150 minutes per week.
Swimming supports your growing bump and relieves pressure on joints.
Avoid exercises that involve lying flat on your back.
Stretch your calf muscles before bed to reduce leg cramps.

Wellbeing

Nosebleeds and bleeding gums are common — pregnancy increases blood volume by up to 50%.
A growing appetite is normal — eat nutritious snacks to fuel yourself and your baby.
Talk and sing to your baby — they can hear you from around this week.
Bonding starts now, not just at birth.

Preparation

Your midwife will listen to your baby's heartbeat with a Doppler — a magical moment.
Start thinking about your birth plan — not a rigid schedule, but your preferences.
Research your hospital's visiting policies for partners and birth partners.
Consider starting a baby registry or wish list.

Tip of the Week

Talk and sing to your baby. They can hear you and it's a lovely way to start bonding.

Frequently Asked Questions for Week 15

How many months is 15 weeks pregnant?

At 15 weeks pregnant, you are roughly 3 months pregnant. Remember that pregnancy is typically measured in weeks rather than months for clinical accuracy.

What size is the baby at 15 weeks?

At 15 weeks, your baby is roughly the size of an apple (about 10.1cm). Your baby is beginning to sense light through still-fused eyelids, and their hearing is developing. They can detect sounds from outside the womb

What are the common symptoms at 15 weeks pregnant?

Common symptoms at this stage include occasional nosebleeds, bleeding gums, growing appetite. Remember that every pregnancy is unique, and it's normal to experience different symptoms.

Is 15 weeks in the second trimester?

Yes, 15 weeks falls within the second trimester.

Are there any NHS appointments at 15 weeks?

Standard midwife check. They'll listen to the baby's heartbeat with a Doppler for the first time.