Across
- 3. — Spontaneous loss of pregnancy
- 4. — Middle layer that forms muscles, bones, and circulatory system
- 9. — Formation of organs during the embryonic stage
- 10. — Agent that causes birth defects
- 11. — Three-month division of pregnancy
- 13. — Identical twins from one zygote
- 17. — Fluid that cushions and regulates temperature
- 20. — Process when cells specialize to perform tasks
- 22. — Fertilized egg with 46 chromosomes
- 23. — Cord that connects fetus to placenta
Down
- 1. — Fraternal twins from two eggs fertilized
- 2. — Outer layer of cells that provides nutrition and support
- 5. — Outer layer that forms brain, nervous system, and skin
- 6. — Inner mass of cells that forms the embryo
- 7. — Period when organs begin to form (2–8 weeks)
- 8. — Longest stage of prenatal development (2 months until birth)
- 12. — Type of abortion occurring naturally, not induced
- 14. — Attachment of zygote to uterine wall
- 15. — Organ that provides nutrients and oxygen to the fetus
- 16. — Cell division process during early development
- 18. — Inner layer that forms digestive and respiratory systems
- 19. — First 2 weeks of development after conception
- 21. — Protective sac filled with fluid