| A | B |
| Amniotic Fluid | The “water” in which a developing baby floats. It acts as a cushion. |
| Amniotic Sac | The thin membrane that surrounds the amniotic fluid and the fetus. |
| Conception | Fertilization of an ovum by a sperm |
| Contraction | Squeezing to push a baby out |
| Egg Cell | The cell from a girl or woman that can start a pregnancy |
| Embryo | The developing baby from implantation to about 8 weeks. |
| Fertilization | The joining of a sperm and an ovum. |
| Fetus | The developing baby from about 8 weeks to birth. |
| Labor | The time during which a woman is having contractions and giving birth to a baby. |
| Placenta | Organ that carry food and oxygen from the mother and waste from the embryo or fetus. |
| Sperm | The cell from a boy or man that can start a pregnancy. |
| Umbilical Cord | The tube leading fromthe navel of the embryo or fetus to the placenta. |
| Pregnant | A woman who is going to have a baby. |
| Implantation – | The ball of cells nesting in the wall of the uterus. |
| Identical Twins | Twins that grew from one egg, fertilized by one sperm. |
| Fraternal Twins | Twins that grew from two eggs, each fertilized by a different sperm. |