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

Amniotic Fluid


4 weeks, 4 days

From The Biology of Prenatal Development.Buy Now

Script: Przed końcem 4. tygodnia wyraźnie widoczna owodnia otacza już zarodek pęcherzem wypełnionym płynem. Sterylny płyn, zwany płynem owodniowym, zapewnia zarodkowi ochronę przed uszkodzeniami.

All ages referenced to fertilization, not last menstrual period.
See Snapshots   |   Log in to create a playlist
Sections of the Brain
Sections of the Brain
Body Cavity Formation
Body Cavity Formation
Amniotic Fluid
Amniotic Fluid
The Heart in Action
The Heart in Action
The Limbs Bud
The Limbs Bud
Transparent Skin
Transparent Skin
When does health begin? Find out now.
Help give babies a healthy start and a healthy future. Donate now.