Answer:
Girls have menstrual cycles because girls have changes of hormones in their body. The hormones make the lining of the uterus build up. This gets the uterus ready for an egg which when the egg is released it causes a period also known as a menstrual cycle which happens normally every month for at least 3-7 days.
Explanation:
Telling the law, calling 911, there are very many answers for this question.
The barrier method is used to prevent the male sperm from traveling to the female egg. Some common forms of birth control that is considered the barrier method are male condoms, female condemns, foams and diaphragms.
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