1.73. Pregnancy and Childbirth http://www.ck12.org
1.73 Pregnancy and Childbirth
- Identify major events of pregnancy and childbirth.
Does a growing embryo always look like a tiny human?
The above picture shows the very early stages of human development. Notice that, at first, the embryo doesn’t look
very human! It takes time for the human features to take shape.
Pregnancy and Childbirth
While a woman is pregnant, the developing baby may be called an embryo or a fetus. Do these mean the same thing?
No, in the very early stages the developing baby is called an embryo, while in the later stages it is called a fetus.
When the ball of cells first implants into the uterus, it is called anembryo. The embryo stage lasts until the end of
the 8thweek after fertilization. After that point until birth, the developing baby is called afetus.
Growth and Development of the Embryo
During the embryo stage, the baby grows in size.