Gonad | Phase | The most represented germ cells observed in the gonads | Approximate timings of collection in 2016 to 2017 |
---|---|---|---|
Ovary | Early | Oocytes with cytoplasmic polarization (<125 μm in diameter) | October, 2016 |
Middle | Oocytes with accumulation of yolk and other components (126-200 μm in diameter) | December, 2016 | |
Late | Oocytes with accumulation of yolk and other components (201-275 μm in diameter) | February, 2017 | |
Premature/ mature | Oocytes with ‘U’-like germinal vesicles and GVBD (>276 μm in diameter) | April, 2017 | |
Testis | Early | Spermatogonia | February, 2017 |
Middle | Spermatogonia and primary spermatocytes | March, 2017 | |
Late | Secondary spermatocytes and spermatids | April, 2017 | |
Mature | Sperm | June, 2017 |