Why girls had a period and will be pregnant?

A period is the shedding of the inner line of the uterus to get rid of unfertilized eggs once a month. A girl can get pregnant if a sperm gets into an egg

c-reactive protein (crp) is an acute phase protein belonging to pentraxin family of proteins, whose levels increases 1000-fold or more in concentration in blood during the occurrence of an injury, inflammation or tissue death.

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in