Across
- 3. Conceptus from fertilization through week 8.
- 4. Human chorionic gonadotrophin (hCG) secreted by __ cells.
- 5. Conceptus from week 9 through birth.
- 8. hCG levels rise until end of __ month.
- 10. hCG decline because __ begins to secrete progesterone & estrogen.
- 12. __ must occur for fertilization to occur.
- 13. Events that occur from fertilization until infant is born.
- 14. Primary germ layers is a __ tissues from which all body organs derive.
Down
- 1. Period time from last menstrual period until birth (280 days).
- 2. hCG prompts __ to continue secretion of progesterone and estrogen.
- 4. Labor consists of how many stages?
- 6. Endoderm & ectoderm are considered __.
- 7. Period of developing offspring.
- 9. __ is a process of giving birth to the baby that expel infant from uterus.
- 11. __ is a formation of placenta from embryonic & maternal tissues.