Second trimester
Week 15 of Pregnancy
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About the size of a apple
4.0 in · 10.1 cm · 2.5 oz · 70 g (crown to rump)
Your baby this week
- The eyes, though still fused shut, are becoming sensitive to light.
- Hearing structures are developing — the baby will soon register sounds.
- The skeleton is hardening from soft cartilage into bone.
What you may be feeling
- Heartburn
- Bloating
- Mild breathlessness
Gentle tips for this week
- Start practicing side-sleeping now; it becomes the recommended position later in pregnancy.
- A pillow behind the back and one between the knees makes side-sleeping comfortable.
Common question for week 15
When should I start sleeping on my side?
Many providers suggest getting used to side-sleeping in the second trimester. From the third trimester, side-sleeping is generally recommended because it improves blood flow to the placenta.
Every pregnancy is different. Sizes are averages, symptoms vary widely, and none of this replaces the guidance of your own provider.