primary ovarian follicle growth
Increase in size of primary follicles including oocyte growth and granulosa and/or theca cell proliferation until more than one layer of granulosa cells is present (preantral follicle).
GO:0022602
ovulation cycle process
is_a
GO:0048589
developmental growth
is_a
GO:0001541
ovarian follicle development
part_of