child development puzzle

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Across
  1. 4. twins if the cell mass decided to split in half and then divide
  2. 7. gene stronger gene
  3. 9. what the developing baby is called from the 3rd week of pregnancy
  4. 10. an egg cell
  5. 11. sac a sac that fills with fluid and surrounds the embryo
  6. 13. incurable condition found in some children and mothers who consume alcohol during pregnancy
  7. 14. Embryonic stage second stag of pregnancy
  8. 15. about every 28 days when an ovum is released by one of a womans two ovaries
Down
  1. 1. presentation when the head is not turned down
  2. 2. uses soundwaves to make video images,called a sonogram, of a unborn baby
  3. 3. gene weaker gene
  4. 5. an infection caused by a parasite. can cause blindness, hearing loss, and learning disability
  5. 6. twin two ovums fertilized by two sperms
  6. 8. when sperm reaches the fallopian tubes, it may penetrate and fertilize the ovum
  7. 12. Germinal stage first stage of pregnancy
  8. 16. Fetal Stage Stage third and final stage of pregnancy