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week 15
Illustration of baby development at week 15 of pregnancy

Development in Progress: Your Baby in the Fifteenth Week of Pregnancy

Updated on

  • Baby size 10.1 cm
  • Approximate weight 70 g
  • About the size of an apple

In the fifteenth week of pregnancy, your baby continues to grow and develop at a rapid rate. It measures around 10-11 cm and weighs about 70 grams. The bones are beginning to harden, especially in the legs and skull. The legs are getting longer than the arms and the joints are developing, allowing the baby to move freely inside the womb. The baby is also beginning to form sleep-wake patterns, and she may begin to react to external stimuli, such as light and sounds. This is an exciting period where each day brings new changes and developments on the path to birth.

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The images and descriptions of the baby's development from week 1 to week 42 have been generated using artificial intelligence. Although they offer a close representation, they are not 100% accurate. For exact, personalized information about your baby's development, we recommend getting an ultrasound and consulting your doctor.

This content is for educational purposes and does not replace medical advice. Sizes and weights are reference averages and vary in every pregnancy. If you notice any warning sign, seek medical care immediately.