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  • Chapter 27 - The reproductive system (part c), the main contents of this chapter include all of the following: Establishing the ovarian cycle, establishing the ovarian cycle, hormonal interactions during a 28-day ovarian cycle, uterine (menstrual) cycle, effects of estrogens,...

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  • Women usually produce one mature egg per menstrual cycle. Because IVF is so expensive, current clinical practice is to give women hormonal drugs to stimulate multiple eggs in one cycle, to increase their chances of pregnancy. For this process, women inject three different hormones over the course of four to six weeks to “shut down” their ovaries, “hyperstimulate” them, and to control the timing that the mature eggs will be released.

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  • Medical practitioners and health care educators must be continually vigilant of the growing and ever-changing health issues related to girls and women who lead an active lifestyle and participate in sports and exercise. There have been landmark legislations that have changed the social perception that girls and women not only can, but should be physically active. With any changing social milieu, there are evolving health issues associated with the journey.

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  • Only human females and some other higher primates have a regular monthly menstrual cycle. Humans, however, are able to mate at any time. Females of almost all other mammal species will mate only at specific times during a year. These times are known as estrus or “heat.” It is only during estrus that egg cells are released for fertilization. Estrus occurs in wolves and deer once a year, in dogs usually twice a year, in cows and horses once a month, and in rats and mice every few days. Ovulation, mating, and fertilization occur on a specific timetable.

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