To the question why we do not find records of these vast primordial periods, I can give no satisfactory answer".
But he admitted candidly, "To the question why we do not find records of these vast primordial periods, I can give no satisfactory answer".
During this period, primordial follicles that are formed after birth and located in the ovarian cortex gradually replace the first wave of follicles until they become the sole source of follicles from 3 months until the end of the reproductive life.
Predictions, all successful, include the initial abundance of chemical elements formed in a period of primordial nucleosynthesis, the large-scale structure of the universe, and the existence and properties of a "thermal echo" from the early cosmos, the cosmic background radiation.
Being submerged for an extended period flips a primordial, water-mammalian switch, she says.
In the period of forming primordial follicles, the germ cells which couldn't be surrounded by pregranular cells would undergo apoptosis [21].
However, we showed here that PAR6, one kind of PAR protein, was localized in the nuclei of mouse oocytes that formed primordial follicles during the perinatal period, suggesting a new role of PAR protein.
The hypoxia observed during the first 5 days after grafting and ischemic damage occurring during this period could induce primordial follicle loss [ 11– 13] and disorders of follicular activation [ 14, 15].
Nevertheless, the sink-particle technique is currently the only method to investigate the evolution of primordial gas clouds over significant periods of time, and efforts are underway to increase their physical realism (Hubber et al. 2013).
Moreover, by tracing the time periods needed for primordial follicles to reach various advanced stages in vivo, we were able to determine the exact developmental dynamics of the two classes of primordial follicles.
