Assertion: primary oocyte | /r/MadeOf | fifth month of fetal life
Facets:
Source sentences:
text: All primary oocytes are formed by the fifth month of fetal life and remain dormant in prophase (diplotene) of meiosis I until puberty.
text: All primary oocytes are formed by the fifth month of fetal life; thus, a female infant is born with her entire supply of gametes.