The female reproductive system produces a reproductive egg cells, called the ova or oocytes.
The oocytes are then transported to the fallopian tube where fertilization by a sperm may occur. The fertilized egg then moves to the uterus, where the uterine lining has thickened in response to the normal hormones of the reproductive cycle.
If the egg isn't fertilized your menstrual cycle starts.
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answer; i believe that the correct answer is (b) melosis; plz check first.good luck