BIOL 404-Exam 4-Reproduction 23

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Author:
kyleannkelsey
ID:
216385
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BIOL 404-Exam 4-Reproduction 23
Updated:
2013-04-28 15:30:31
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BIOL 404 Exam Reproduction 23
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BIOL 404-Exam 4-Reproduction 23
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  1. How do spermacides work?
    Kill sperm in the vagina
  2. What is the failure rate of spermacides?
    20-50%
  3. What isthe failure rate of sterilization?
    <0.5%
  4. What is the failure rate of IUDs?
    <3%
  5. How do hormonal birth controls work?
    • prevent ovulation by suppressing LH spike
    • Alter endometrium to prevent implantation
    • Thicken cervical mucus
  6. What form of hormonal birth control is the most effective?
    Injectable or implantable
  7. What can alter sex differentiation?
    • atypical chromosomal combinations
    • Mis-expression of SRY
    • Androgen insensitivity
    • Production of Mullerian-inhibiting substance
  8. What establishes the onset of puberty?
    Increased adrenal androgens
  9. What does increased adrenal androgens indicate?
    The onset of puberty
  10. What causes menopause?
    The cessation of ovarian response to GnRH
  11. What is the name for the cessation of ovarian response to gonadotrophins?
    Menopause
  12. What hormones are important for parturition?
    oxytocin and prostaglandins
  13. What two hormones increase continually during pregnancy?
    estrogens and progesterone
  14. What hormone is only produced during the first trimester?
    Chorionic gonadotropin
  15. Describe major changing hormone levels during pregnancy

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