Assertion: ovary's oocyte | /r/CapableOf | undergo atresia
Facets:
value: during childhood
type: TEMPORAL
value: before birth
type: TEMPORAL
Source sentences:
text: • Oocytes undergo atresia (degeneration) just before birth, so there are only about 2 million present at birth.
text: Primary oocytes undergo atresia again during childhood, so only 300,000-400,000 remain at the beginning of puberty.