Baby development at week 15
Leg bones lengthen. Blood vessels show through thin skin. Hearing structures continue maturing so muffled sounds may register later.
Average size estimates for week 15 are about 10.1 cm and 70 g — roughly apple. Your ultrasound report and clinician’s dating override any website average.
What you might feel
You might notice a glow — or acne, or both. Skin changes are hormonal and temporary for many.
You are in the second trimester. Two pregnancies at the same week can feel completely different — treat these notes as orientation, not a checklist you must match.
What to track this week
- Symptoms, mood, sleep, and energy in your daily log
- Water intake toward a simple daily goal
- Appointment dates and questions for your care provider
A calm next step in Preglo
Log skin, sleep, and mood if they affect your week; trends help conversations with your midwife or doctor.
Also useful: due date calculator · all weeks · Preglo features
Nearby weeks: Week 13 · Week 14 · Week 16 · Week 17
Educational averages only — not medical advice. Contact your clinician for symptoms that worry you, bleeding, severe pain, or reduced movements.