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

Playlist: Facial Expressions

The External Ear

#219, Movie 1 of 30

7 months, 3 weeks

See Snapshots


between high- and low-pitched sounds.

By 30 weeks, breathing movements are more common and occur 30 to 40% of the time in an average fetus.
From The Biology of Prenatal Development.Buy Now
    All ages referenced to fertilization, not last menstrual period.
Buy the Biology of Prenatal Development DVD
Free resources and training for educators