Why does the lining of the uterus thicken with blood and tissue before ovulation?

Almost all states designate a group of professional as mandatory reporters of suspected child abuse or neglect. is it only school administration staff are included on nearly every list?

Which of the following methods had the highest risk of transmitting hiv? a) oral sex b) sharing needles c) sweat d) preseminal fluid

How does emergency conception reduce the risk of pregnancy