Across
- 2. prevents the placenta from getting enough blood to nourish the fetus
- 3. syndrome alcohol related birth defects
- 5. when the zygote attaches to the uterine wall
- 6. procedure in which a syringe is used to get amniotic fluid for testing
- 13. 1st stage of birth
- 15. basic units of heredity
- 16. 3rd stage of birth
- 18. thick blood-rich tissue that nourishes the embryo
- 19. a cluster of cells developed between the 3rd and 8th week
- 21. the confidence to control one's own body and actions
Down
- 1. union of sperm and egg
- 4. the chemical unit that makes up chromosomes
- 7. spontaneous expulsion of a fetus before the 20th week
- 8. threadlike structures found in the nucleus of the cell
- 9. a dead fetus expelled from the body after the 20th week
- 10. Curvature of the spine
- 11. group of cells after the 8th week
- 12. sac a thin fluid filled membrane that surrounds the embryo
- 14. cord rope-like structure that connects embryo and placenta
- 17. the passing of traits from parents to children
- 20. the final stage of pregnancy when the uterus contracts