Animalscaretips
Why menstruation does not occur in male?
And if conception does not occur, they do not have a uterine lining that will be released from the body as blood through the vagina, which is what is referred to as a period or menstruation,” Brito explains. “In this definition, men do not have these types of periods.”
Why do only men menstruate?
Invasive embryos
A more plausible explanation for menstruation is that it evolved to accommodate the peculiar way in which human embryos embed into the lining of the uterus – the endometrium – during pregnancy. In some mammals with a placenta, a fertilised embryo attaches to the endometrium only superficially.
