Estral cycle - proestrus
Estral cycle - estrus
Estral cycle - metestrus
Estral cycle - diestrus
Meiosis in testes (leptoten and pachyten)
Meiosis in testes (diploten)
Meiosis in testes (diakinesis)
Oogenesis in ovarium with primary follicle
Oogenesis in ovarium with Graafian follicle
Budding yeast
Sperm cells of ram (sheep male)
Sperm cells of rat
Spermiogenesis in testes
Spermiogenesis in testes
Louse - imago
Louse - larva
Ontogenic development of different animal species