Gametogenesis and Follicular Development

At what stage of follicular development does the antrum first appear?

Which structure directly surrounds the oocyte as it is released during ovulation?

What is the primary fate of the corpus luteum if pregnancy does not occur?

Which cells differentiate into the theca interna and theca externa?

What is the primary function of the corpus luteum during the first few months of pregnancy?

Which of these is NOT a key process during follicular development stages?

During which stage of meiosis are the oocytes arrested until puberty?

What is the name given to the structure formed immediately after follicle rupture, before the formation of the corpus luteum?

What is secreted by granulosa cells that contributes to the formation of the zona pellucida?

What is the name of the layer of cells connecting the oocyte to the granulosa layer?

Gametogenesis in Females

Female gamete development begins in the sixth week of embryonic life.
Oocytes are arrested in meiosis I at birth.
A limited number of oocytes (300-400) mature, due to atresia (cell death).
Primordial follicles develop into primary follicles.
Primary follicles transition to multilaminar primary follicles.
Primary follicles transform into secondary follicles.
Secondary follicles transform into Graafian follicles.
The antrum forms, and the granulosa cells proliferate.
The zona pellucida forms from granulosa cells.
The theca interna and externa layers develop.
The corona radiata surrounds the oocyte.
The oocyte is linked to the granulosa layer by the cumulus oophorus.
The dominant follicle releases the secondary oocyte.
Ovulation releases the oocyte into the peritoneal cavity
After ovulation, the follicle collapses, forming a corpus hemorrhagicum.

Follicular Development

Several follicles develop, but only one typically ovulates.
The dominant follicle's granulosa and theca interna cells change after ovulation into the corpus luteum.

Ovulation

Ovulation releases a secondary oocyte surrounded by corona radiata.
The dominant follicle ruptures, releasing the oocyte.
The ruptured follicle collapses and fills with blood, forming a corpus hemorrhagicum.

Corpus Luteum Formation

Granulosa and theca interna cells develop into the corpus luteum.
The corpus luteum secretes progesterone and estrogen.
In non-pregnancy, the corpus luteum degenerates after about 10 days into the fibrous corpus albicans.
In pregnancy, the corpus luteum persists for about three months, until the placenta takes over endocrine function.

This quiz covers the process of female gametogenesis, starting from oocyte development and maturation to the intricacies of follicular growth. Key concepts include the stages of follicle development, meiotic arrest, and the events surrounding ovulation. Test your knowledge on these essential reproductive biology topics.