| A | B |
|---|
| EMBRYO | early stages(to 9 weeks) of development |
| FETUS | 9-40 weeks of development |
| BLASTOCYST | early stage of embryo development |
| IMPLANTATION | attachment of embryo to endometrium |
| HCG | placenta hormone that maintains corpus luteum |
| CHORION | outer layer of developing embryo |
| AMNION | fluid filled embryonic membrane |
| PLACENTA | site of exchange of nutrients & wastes between mother & fetus |
| ALLATONOIS | embryonic membrane |
| UMBILICAL CORD | connects fetus to placenta |
| FIRST TRIMESTER | conception - 3rd month of pregnancy |
| SECOND TRIMESTER | 3rd - 6th monthof pregnancy |
| THIRD TRIMESTER | 6th - 9th month of pregnancy |
| RELAXIN | hormone released by placenta which allows pelvic ligaments to loosen prior to labor |
| OXYTOCIN | hormone which causes strong uterine contractions |
| PROLACTIN | hormone associated with milk production |
| IN VITRO FERTILIZATION | fertilization which occors outside the body |
