Oogenesis Flashcards
define
oogonia are transformed to mature oocytes
when
initiates before birth
permanent cessation of menstrual cycle
menopause
before birth
prenatal maturation of oocytes
steps in prenatal maturation
enlargement of oogonia
formation of primary spermatocyte
flattened follicular cells around it
zona pellucida forms
acellular, amorphous, glycoprotein coat around oocyte
zona pellucida
flattened follicular connective tissue cells
corona radiata
the follicle formed
primordial follicle
primary oocyte arrested in which phase
dictyotene of prophase
substance secreted by follicular cells to arrest the meiosis until puberty, remain dormant
oocyte maturation inhibitor
after birth
postnatal maturation at puberty
amount of follicle maturing each month
1
released at
ovulation
dictyotene
prolonged resting phase in oogenesis
division
complete meiosis 1
formation of
secondary oocyte and 1st polar body
division of cytoplasm
unequal
when meiosis 2?
at ovulation
arrested at
metaphase 2
resume the division
if penetrated by the sperm
what is it called after completion of meiosis 2?
mature oocyte
number of oocytes in neonate?
2 million
number of oocytes until puberty
40,000
number of secondary oocytes formed
400
what can reduce the number of oocytes ovulated?
contraceptives
function of contraceptives
prevention of maturation of oocytes
