Question

What happen when zygot didnt formed in uterus

Answer 1

The lining of the uterus (endometrium) prepares for the developing blastocyst to attach to it via many internal changes. Without these changes implantation will not occur, and the embryo sloughs off during menstruation. ... If the zygote implants in any area besides the uterus, the result is an ectopic pregnancy.

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Answer 2

If zygote is not formed then basically the thick lining of the uterus slowly breaks and comes of the vagina as blood and mucus . This is known as mensuration . It lasts for two to eight days