Differences Between Spermatogenesis And Oogenesis: The following are the points of Differences Between Spermatogenesis And Oogenesis. Spermatogenesis Oogenesis It occurs in the seminiferous tubules of testes. It occurs in the follicle cells of ovaries. It is completed in testes. It is completed in the female genital tract. Begins only at puberty. Begins before birth in the foetus. A baby girl is born with a set number of primary oocytes already in prophase I stage. After maturity, it is a continuous process and occurs all the time. Discontinuous process, only one egg matures in about 28 days. Here, male sex cells … Continue reading Differences Between Spermatogenesis And Oogenesis