Oogenesis - Primary Oocyte Flashcards
What is the ploidy number of primary oocyte?
4N
In what type of follicle are primary oocytes in prior to puberty?
Primordial follicle
What is the chromosome content of primary oocyte?
Contains 46 double-chromatid chromosomes
Which cells secrete oocyte maturation inhibitor?
- what is its action?
Oocyte maturation inhibitor is secreted by the surrounding follicular cells
- inhibits further development of primary oocyte while in primordial follicle
How many primary oocyte are present at birth
~1 million
How many primary oocyte form after birth?
No new primary oocyte form after birth
How many primary oocyte are present at puberty?
- what happened to the rest?
~400,000 present at birth
- other became atretic and degenerated
What does FSH cause to happen to primary oocytes?
Accelerates follicular growth in vitro
