| A | B |
|---|
| heredity | genetic passing of traits from parent to child |
| puberty | stage of sexual development when you become able to reproduce |
| scrotum | saclike pouch that holds the testes and controls the temperature |
| tests | male sex glands; they produce sperm and testosteron |
| Adolescence | the time between childhood and adulthood |
| sperm | the male reproductive cell |
| uterus | organ where the baby gros and develops |
| miscarriage | the ending of a pregnancy without outside help |
| hormone | a chemical secretion that causes a function somewhere in the body |
| ovaries | female sex glands, store the eggs and produce estrogen and progesterone |
| menstruation | the sheeding of the lining of the uterus, about every 28 days |
| fertlization | when the egg and sperm meet to make 1 cell |
| fetus | term used for the developing baby starting in the 8th week |
| breech birth | when a baby is born feet or buttocks first |
| labor | when the muscles of the uterus contract and push the baby out |
| first day | time the egg and sperm combine to form a single cell |
| 4th month | month the baby kicks it's legs and moves |
| 1 month | month the heart starts to beat |
| 8th and 9th months | months that fat cells form and the baby is born |
