Your developing baby – week 15

by Kaiser Permanente |
Fetus at week 15, illustration

During week 15, your baby is around 4.5 inches long, weighs over 2 ounces, and is about the size of an avocado. Your baby’s:

  • Ears shift from the neck area toward their final position on the head.
  • Eyes shift from the side of the head toward the front of the face.
  • Bones and muscles continue to grow and strengthen.

Your baby can now swallow, suck, and breathe in amniotic fluid.

They’re also active and moving their head, arms, legs, hands, feet, and mouth. Your baby can even curl their toes and fingers. However, you may not feel their movements until weeks 18 to 22.

This article has been created by a national group of Kaiser Permanente ob-gyns, certified nurse-midwives, pediatricians, lactation consultants and other specialists who came together to provide you with the best pregnancy, birth, postpartum, and newborn information.

Some of the content is used and adapted with permission of The Permanente Medical Group.