Prenatal Development Zygote Developing baby first two weeks

Prenatal Development

Zygote • Developing baby first two weeks of pregnancy.

Embryo • Developing baby 3 rd-8 th week of pregnancy.

Fetus • Developing baby after 8 th week until term.

Pregnancy Timeline • 2 Weeks • Developing baby is known as a zygote • 3 Weeks • Primitive heart beat. • Every feature and vital organ are started.

Pregnancy Timeline • 8 Weeks • Developing baby is known as a embryo • 12 Weeks • Can move arms and legs. • Bone cells begin to replace cartilage.

Pregnancy Timeline • 16 Weeks • External sex organs start to appear. • 20 Weeks • Internal organs are well developed. • You can hear the heartbeat.

Pregnancy Timeline • 24 Weeks • 28 Weeks • Respiratory system is developing and getting ready to work outside the womb. • Baby is growing and you can feel the baby move intensly.

Pregnancy Timeline • 37 -40 Weeks • Prenatal growth is rapid, if continued after birth, the baby would weigh 160 pounds by his/her 1 st Birthday.

Amniotic Fluid Placenta Umbilical Cord Chorion Amniotic Sac Plug of Mucus Cervix Birth Canal

Prenatal Terminology • Prenatal development is the development before birth. • Prenatal period lasts about 40 weeks. • The prenatal period is broken into trimesters.

The Umbilical Cord A. Passes oxygen, and nutrients from the to the child. mother B. Returns waste products back to the mother. • Connection between the fetus & the placenta.

The Placenta A. Is an organ that develops between the embryo and the uterus during pregnancy. B. It filters nutrients and oxygen to the fetus.

Amniotic Fluid A. Guards against jolts B. Keeps the fetus at a constant temperature. C. Keeps the fetus from forming adhesions to the uterine wall.

Amniotic Sac A. Holds the amniotic fluid. B. Is a clear transparent membrane. C. Is very strong until broken.

Uterus A. Fetus grows inside B. Hollow expandable muscle.

When the Due Date? A. Determine the 1 st day of the mothers last period. B. Count back 3 months C. Add 7 days

What is the due date? May 11 th February 18 th January 5 th October 12 th

The End!