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Across 5. hormone produced by the testes 8. precocious puberty in boys can cause this 10. use of this drug can decrease sperm count 15. during artificial insemination semen may be placed in this 17. early puberty may be called this 19. release of the endometrium 20. a part of the sperm that contains enzymes to break through the egg wall 23. a woman's fertile period can last this many days 25. a chemical messenger 26. the Tanner scale describes primary and secondary _____ characteristics 27. inbreeding leads to increased expression of these types of traits 30. genetic material is located in this part of the sperm 31. germ line cells are stem cells that can develop into these 32. this type of reproduction leads to limited genetic diversity 33. during in vitro fertilization egg and sperm are combined ________ the body

Down 1. one possible cause of delayed puberty 2. the process by which most body cells replicate 3. these drugs can cause testicles to shrink 4. precocious puberty in boys is usually caused by this type of problem 6. going through this process allows people to reproduce 7. this hormone helps the female body maintain pregnancy 9. female infertility can be due to an untreated ________ 11. this gland produces FSH 12. this gland produces GnRH 13. release of a mature egg from the ovary 14. the male gamete 16. number of chromosomes in a gamete 18. only males have these endocrine glands 21. only females have these endocrine glands 22. hormone produced by the ovaries 24. the presence of these in our foods may contribute to precocious puberty 28. the female gamete 29. the process by which germ line stem cells replicate