What is the normalduration of the menstrualcycle? How does the calendarcontraceptive method work?

Human Physiology: From Cells to Systems (MindTap Course List)
9th Edition
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Lauralee Sherwood
Chapter20: The Reproductive System
Section: Chapter Questions
Problem 3RE
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What is the normal
duration of the menstrual
cycle? How does the calendar
contraceptive method work?

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Step 1

Reproduction is the process by which an organism creates more of its own progeny. Reproduction is important from the point of evolution because only when there are more numbers of a species can there be a scope for evolution in the organism. Reproduction takes place in two ways- sexual reproduction which requires two partners of opposite sex and asexual reproduction which requires a single parent.

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