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The hormone responsible for the development and maintenance of male secondary sexual characteristics is:
The hormone mainly responsible for the development and maintenance of female secondary sexual characteristics is:
The tubular portion of the uterus that extends downward into the upper part of the vagina is the:
In the female reproductive cycle, menstrual flow occurs when the concentrations of:
Estrogen and progesterone are low
Women athletes sometimes experience disturbances in their menstrual cycles because of:
decreased synthesis of estrogens
Many women should have their breasts examined with mammography at regular intervals after the age of:
Sperm development is negatively affected at body temperature so the sperm develop in the scrotum which a few degrees cooler than the rest of the body.
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