| A | B |
|---|
| abortion | loss of embryo or fetus before the 20th week of pregnancy |
| amniotic sac | sac that surrounds and cushions developing fetus |
| embryo | developing offspring during first 2 months of pregnancy |
| fertilization | union of an ovum and spermatozoon |
| fetus | developing offspring from third month of pregnancy until birth |
| gestation | development from conception to birth |
| human chorionic gonadotropin (hCG) | hormone produced by embryonic cells soon after implantation that maintains corpus luteum |
| implantation | embedding of fertilized egg into lining of uterus |
| lactation | secretion of milk |
| oxytocin | hormone from posterior pituitary that causes uterine contraction and milk ejection from the breasts |
| parturition | childbirth & labor |
| placenta | structure that nourishes and maintains developing fetus |
| prolactin (PRL) | hormone from anterior pituitary that stimulates milk production |
| umbilical cord | structure that connects fetus to placenta |
| zygote | cell formed by union of sperm and egg |
