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

Slideshow: Entire Image Gallery by EHD

#2, Slide 2 of 312

 

Note:

The head of each spermatozoon contains a unique set of paternal chromosomes.

Label Key:

1. tail
2. midpiece
3. neck
4. head (acrosomal cap)
All ages referenced to fertilization, not last menstrual period.
Help give babies a healthy start and a healthy future. Donate now.
Buy the Biology of Prenatal Development DVD