Skip Navigation
The Endowment for Human Development
The Endowment for Human Development
Improving lifelong health one pregnancy at a time.
Donate Now Get Free Videos

Movie Theater

Responds to Sound


5 months

From The Biology of Prenatal Development.Buy Now

Script: By 20 weeks the cochlea, which is the organ of hearing, has reached adult size within the fully developed inner ear. From now on, the fetus will respond to a growing range of sounds.

All ages referenced to fertilization, not last menstrual period. One month = 4 weeks.
See Snapshots   |   Log in to create a playlist
Bronchial Tree
Bronchial Tree
Circadian Rhythms
Circadian Rhythms
Responds to Sound
Responds to Sound
Skin and Hair
Skin and Hair
Age of Viability
Age of Viability
4D Ultrasound
4D Ultrasound
Tell your story. Create your own pregnancy calendar.
When does health begin? Find out now.