<P> Normally, only one of the pairs of tubes will develop while the other regresses and disappears in utero . </P> <P> The homologous organ in the male is the rudimentary appendix testis . </P> <P> When an oocyte is developing in an ovary, it is encapsulated in a spherical collection of cells known as an ovarian follicle . Just prior to ovulation the primary oocyte completes meiosis I to form the first polar body and a secondary oocyte which is arrested in metaphase of meiosis II . This secondary oocyte is then ovulated . The follicle and the ovary's wall rupture, allowing the secondary oocyte to escape . The secondary oocyte is caught by the fimbriated end and travels to the ampulla of the uterine tube where typically the sperm are met and fertilization occurs; meiosis II is promptly completed . The fertilized ovum, now a zygote, travels towards the uterus aided by activity of tubal cilia and activity of the tubal muscle . The early embryo requires critical development in the Fallopian tube . After about five days the new embryo enters the uterine cavity and on about the sixth day implants on the wall of the uterus . </P> <P> The release of an oocyte does not alternate between the two ovaries and seems to be random . After removal of an ovary, the remaining one produces an egg every month . </P>

Fertilisation occurs in which part of fallopian tube