zygote

1
zygote
embryo
Labor muscle contractions in the uterus cause
the cervix to enlarge so that the baby can fit
through the opening. Delivery the baby is
pushed completely out of the uterus, through the
vagina and out of the body Afterbirth
contractions push the placenta out of the uterus
through the vagina
Fetus
Identical Twins are formed from a single zygote.
Fraternal twins are formed when two different
sperm fertilize two different eggs.
The head grows at a slower rate that the rest of
its body
amniotic sac
placenta
umbilical cord
uterus
vagina
2
Additional Notes

• Placenta membrane that passes nutrients from
  the mother to the embryo.
• Eggs are fertilized in the fallopian tube and the
  zygote goes to the uterus to attach and develop.
• Puberty when a person becomes physically able
  to reproduce