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Travka [436]
3 years ago
15

The first phase of the uterine cycle is the ________ phase.

Biology
1 answer:
Minchanka [31]3 years ago
5 0
Menstrual phase, begins at day 1 and lasts till approximately day 5. The uterus sheds its inner lining of soft tissue and blood vessels, which exits the body. Cramps are caused by the contraction of the uterine and the abdominal muscles to expel the menstrual fluid.
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