Human Development & Birth
Study Questions

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  1. Which of the following methods would give accurate estimates for birth dates in humans? (check all that apply)
  1. Add 7 days to the first day of the last menstrual cycle and count back 3 months from that date.
  2. Add 266 days to the day of conception.
  3. Count back 96 days from the day of fertilization.
  4. Add 7 days to the first day of the last menstrual cycle and count forward 9 months from that date.
  1. April is having a baby. The length of her menstrual cycle is typically 28 days. On the fifteenth of June, she fails to begin menstruating. Which of the following dates is the best estimate for the birth date of her child?
  1. February 20-25
  2. March 3-5
  3. February 15-18
  4. March 28-30
  5. February 3-5
  1. June is expecting. Her menstrual cycle is typically 28 days. On October 17 she failed to begin menstruating. Which of the following dates is the best estimate for the due date of her baby?
  1. July 27
  2. June 26
  3. July 17
  4. June 19
  1. June is expecting again. This time, the first day of her last regular menstrual cycle was March 21. About when is her baby due?
  1. December 21
  2. January 18
  3. December 28
  4. January 25
  1. During which stage of pregnancy is the fetus most susceptible to mutagenic influences?
  1. at conception
  2. first trimester
  3. second trimester
  4. third trimester
  5. at birth
  1. Capacitation is where:
  1. the head of the sperm falls off because it is not suited for reproduction.
  2. the fetus has the capacity to live outside the womb.
  3. the sperm become activated after being deposited in the female reproductive tract.
  4. a sperm enters the egg and initiates meiosis II.
  1. Which of the following is/are true concerning oxytocin and prostaglandin? (check all that apply)
  1. Their production is stimulated by the sharp decrease in estrogen and progesterone levels.
  2. They initiate labor.
  3. They cause uterine contractions.
  4. They stimulate the release of milk.
  5. at birth
  1. When does the heart begin to beat?
  1. at conception
  2. first trimester
  3. second trimester
  4. third trimester
  5. at birth
  1. When is a fetus capable of surviving outside the womb?
  1. at conception
  2. first trimester
  3. second trimester
  4. third trimester
  1. Only one sperm is needed to fertilize an egg.
TRUE
FALSE
  1. Polyspermy takes place when more than one sperm penetrates the egg.
TRUE
FALSE
  1. The egg is viable for only 15-24 hours after ovulation.
TRUE
FALSE
  1. Fertilization is the process of the sperm fusing with the egg inside the uterus.
TRUE
FALSE
  1. A sharp increase in the levels of estrogen and progesterone signal the initiation of labor.
TRUE
FALSE
  1. Implantation of the embryo into the lining of the uterus begins about one week after fertilization.
TRUE
FALSE
MATCHING: (a, b, or c)
(use lower case; incorrect responses will be replaced with a "?".)

16. cervix a. dilation

17. placenta b. expulsion

18. 2 to 60 minutes c. placental

19. baby is born

20. 2 to 16 hours

21. episiotomy

22. 15 to 30 minutes

23. hardest contractions

24. crowning
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