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8 Nov 2021
Problem 20
Page 1259
Section 43.2: Review Questions
Chapter 43: Animal Reproduction and Development
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8 Nov 2021
Background and context
During a woman’s fertile years, the endometrial lining of the uterus keeps changing in thickness every month. The levels of estrogen and progesterone stimulate the growth and maintain the thickness of the lining if pregnancy occurs. If pregnancy does not happen, the lining is shed in the form of menstruation.
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