Uterine contraction

... hormonal cycle. Some women suffer painful and uncomfortable because of uterine contraction, bleeding, and unbalance 'tone' resulted from the hormonal change. However, some ...

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... would be more difficult B. ADH levels in the bloodstream would drop C. Uterine contraction would not begin for labour D. Oxytocin levels would increase in the bloodstream ...

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... eggs and direct them to male's brood pouch (like female mammal's uterine structure) thru a pipe processed from her belly. The male will take ... the male starts to jerk to release them out one by one, with similar contraction like when a pregnant woman is about to deliver her baby (ouch!). ...

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... so that the production of estrogen. This estrogen will stimulate the contraction of uterine muscles, so this is when the menstrual cycle begins. I hope I am not confusing you. ...

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