The ovulation process starts with ovulation. After the end of menstruation, the estrogen in the body gradually rises and the egg cells begin to develop over a period of about a week or so. As the follicle matures and moves towards the surface of the ovary, the epidermal layer that encases the follicle becomes thinner and the intrafollicular fluid becomes more and more abundant, leading to a gradual increase in pressure within the follicle, which eventually ruptures and releases the egg. After the egg is released it will be picked up by the ipsilateral fallopian tube umbrella and returned to the fallopian tube to wait for sperm. If it encounters sperm, a fertilized egg will form and develop into a fetus. If it does not encounter sperm, the egg will die in about two days and will be discharged with the uterine secretions, which is one of the components of the leucorrhoea, i.e. the dead egg is discharged with the leucorrhoea. However, since the oocytes are small and mixed with the leukorrhea, they are not easily detected even if they are discharged.