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
Help give babies a healthy start and a healthy future. Donate now.
Buy the Biology of Prenatal Development DVD