Reproduction and Development

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Across
  1. 2. The third and final stage of a developing baby.
  2. 8. The d---------t of an unborn baby takes 9 months.
  3. 10. A mother's use of cocaine can cause this, meaning the death of the fetus.
  4. 12. A human s--c--l has 23 chromosomes.
  5. 13. This is the ward in the hospital where babies are delivered.
  6. 17. If an egg is fertilized by a sperm cell, it will ------- on the wall of the uterus and develop into an embryo.
  7. 19. First stage of a developing baby is -----e, then an embryo, finally a fetus.
  8. 21. When a sperm and egg cell come together during fertilization, the fertilized egg has a full set of these.
  9. 22. Women usually have a baby when they are 9 months --------.
  10. 24. Nutrients and ------ pass from the mother's blood to the embryos blood through the placenta.
  11. 26. This hormone causes the growth and development of male characteristics.
  12. 28. The hormone that causes the growth of sexual characteristics in females.
  13. 30. During this, an unfertilized egg is released from the ovary and travels to the uterus.
  14. 32. A drug called Thalidomide caused serious ----- ------- in babies during the 50s and 60s.
  15. 33. This drug can cause a miscarriage.
  16. 34. Sperm and egg cells are formed through a process called me-----
  17. 36. This cycle in women is about 28 days long.
Down
  1. 1. Having babies.
  2. 3. Part of a woman's baby where a baby develops.
  3. 4. The 3 -------- necessary for human reproduction are: estrogen, testosterone and progesterone.
  4. 5. A problem is passed from parent to child through sperm or the egg.
  5. 6. When a baby is born dead.
  6. 7. steal (slang)
  7. 9. The menstrual cycle is controlled by the hormones estrogen and pro---------.
  8. 11. Hormones are chemicals that are made in small organs called ------.
  9. 14. ------ born to smokers are often underweight.
  10. 15. This is like a filter through which nutrients and oxygen pass from the mother to baby.
  11. 16. This from the father joins with the egg from the mother and produces a zygote.
  12. 18. A condition that can occur when the mother drinks alcohol while pregnant.
  13. 20. In 9 months, a baby develops from one cell into this with billions of cells.
  14. 23. Sperm from the father fertilizes this from the mother.
  15. 25. Another name for uterus. It rhymes with tomb.
  16. 27. Scientists have started to link some of these with certain problems.
  17. 29. A filter that allows substances to pass between the embryo and the mother.
  18. 31. Smoking these may cause stillbirth or the baby to be underweight.
  19. 35. The second stage of a developing baby.