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

Hormonal Stress Response


4 months, 1 week

From The Biology of Prenatal Development.Buy Now

Script: By 16 weeks, procedures involving the insertion of a needle into the abdomen of the fetus trigger a hormonal stress response releasing noradrenaline, or norepinephrine, into the bloodstream.

All ages referenced to fertilization, not last menstrual period. One month = 4 weeks.
See Snapshots   |   Log in to create a playlist
Movement
Movement
4D Ultrasound
4D Ultrasound
Hormonal Stress Response
Hormonal Stress Response
Vernix Caseosa
Vernix Caseosa
4D Ultrasound
4D Ultrasound
Bronchial Tree
Bronchial Tree
Buy the Biology of Prenatal Development DVD
Free resources and training for educators