Question

what happens to the lining of uterous?and when 1)before release of eggs,2)if no fertilisation ​

Answer 1

Omkar i have answered it .in first question .

Answer 2

Listen when b4 the release of ovum the uterus bcm thin when the ovum get into the uterine wall all blood vessels get collected and there and provide a familiar situation and when that ovum doesn't get fertilise then it gets destroyed and comes along the urine in form of blood