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Repro and Ecology 1108 ppt handout0

Repro and Ecology 1108 ppt handout0 - What can go wrong...

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1 1 Regulation of Human Reproduction 2 What can go wrong? During pregnancy In Pregnancy planning 3 4 Q1. You and your partner decide to start a family. To maximize your chances to get pregnant: on which days should you definitely have sex? (assume a 28-day cycle; day 1=first day of menstruation) A. Day 1-5 B. Day 5-10 C. Day 10-15 D. Day 15-20 E. Day 20-28 5 6 Q2. How long does the egg cell survive in the female body?
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2 7 Q3. How long does sperm survive in the female body? 8 We don’t know exactly how long a given sperm survives in a given female environment (there is variation that depends on the viability of the individual sperm and the chemical environment of the individual female body). Q4. If asked for advice by your friends that do NOT want to become pregnant: should they assume the longest or shortest possible sperm survival time to increase their odds of NOT becoming pregnant? A. Shortest possible B. Longest possible Explain to them why! 9 Q5. If asked for advice by your friends that DO want to become pregnant ASAP, should they assume the longest or shortest possible sperm survival time to increase their odds of becoming pregnant? A. Shortest possible B. Longest possible Explain to them why! 10 11 Common misconceptions Teen pregnancy rates (per 1000 girls 15-19 years old) are about 4 times higher in the U.S. than in other developed countries.
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