20 h 30 min, 27 avr. 2002 ans - Weeks 1-3
Description:
Millions of sperm cells are released into the fallopian tube of the female during ovulation. These cells then begin to try to penetrate the egg to create a baby. However, one only sperm cell will bond with the egg to form a zygote.
Ajouté au bande de temps:
Fetal Development Timeline
Date:
