| A | B |
|---|
| Abstinence | Choosing not to engage in sexual activity. |
| Adolescence | The physical, emotional, & social transition from childhood to adulthood. |
| Birth defects | Abnormality present in a baby at birth. |
| Chronic disease | Illnesses that develop & last over a long period of time. |
| Estrogen | Female reproductive hormone. |
| Fertilization | The union of the sperm & ova. |
| Infertility | Being unable to produce children. |
| Learning disability | Condition in which a person has difficulty learning. |
| Menstruation | The flow of the uterine lining & unfertilized ova from the body. |
| Ovulation | The release of a single mature ovum each month. |
| Puberty | The stage of growth between ages 8-13 in females & 10-15 in males when secondary sex characteristics develop. |
| Sexually transmitted disease | Diseases spread through sexual contact. |
| Testosterone | Male reproductive hormone. |
