spermatogenesis and oogenesis are meiotic cell division processes that occur within the male and female respectively spermatogenesis sperm production oogenesis egg production spermatogenesis is a continuous process that begins with puberty and continues into old age so it starts with the spermatogonium which is a diploid cell that undergoes mitosis to create two primary spermatocytes and that's when meiosis occurs so in stage one of meosis the primary spermatocytes will divide into two secondary spermatocytes in stage two of meiosis they will divide into four spermatids these four spermatids then become modal to create four equal-sized sperm cells so remember we said we start with two primary spermatocytes that means in total one spermatogonium will create eight equal sperm cells oogenesis begins prior to birth so that means within the embryo the oogonia are undergoing mitosis to divide into two primary oocytes but then the process is put on hold so a baby girl is born with all the primary oasd she will ever have and that's why after a woman reaches a certain age oogenesis stops there are no more primary oocytes to initiate meiosis the production of the egg cell is reactivated when the girl hits puberty and that's when stage one of meiosis occurs hormones are released into the body that activate the primary oite to divide into the secondary oite the process is put on hold again meiosis 2 doesn't begin until fertilization and you can tell that in both meiosis 1 and two of oogenesis the cytoplasm divides unequally to form one egg and smaller polar bodies these polar bodies eventually just disintegrate whereas the egg continues to develop so one primary oite will produce one egg cell which means one oogonium will produce a total of two egg cells in the end so remember spermatogenesis sperm production starts at puberty continues into old age begins with spermatogonium ends with eight equal-sized sperm cells oogenesis starts prior to birth continues but stops after a woman reaches menopause and one oogonium can produce two egg cells