11. Human primary oocytes are present at an intermediate stage of meiosis, termed prophase I ( see Oogenesis ). 12. In 1951 Zuckerman published his paper summarizing the existing data both for and against the possibility of postnatal oogenesis . 13. One scientist has taken a time-lapse movie of egg formation, or oogenesis , in the fruit fly. 14. Human primary oocytes are present at an intermediate stage of meiosis, that is prophase I ( see Oogenesis ). 15. These substances act as an anti-aphrodisiac causing a dejection of subsequent copulations, and also stimulate ovulation and oogenesis . 16. Insect sexual reproduction starts with sperm entry that stimulates oogenesis , meiosis occurs and the egg moves down the genital tract. 17. The supply of immature egg cells in the ovaries is fixed during embryonic development, well before birth-see oogenesis . 18. GDF9 is essential for the overall process of folliculogenesis, oogenesis and ovulation and thus plays a major role in female fertility. 19. Since they are hermaphrodites, and they perform both oogenesis and spermatogenesis, I wonder how they split their chromosomes during meiosis. 20. Oogenesis consists of several sub-processes : oocytogenesis, ootidogenesis, and finally maturation to form an ovum ( oogenesis proper ).
