we conclude that ( a ) culture of granulosa cells from an individual follicle in a serum-free medium can be used to study the secretion of ot and p from bovine granulosa cells , ( b ) insulin is essential for the optimal production of ot and p by these cells , and ( c ) the addition of theca or other tissues enhanced ot secretion by a mechanism not understood .
C0018120
follicle
C0018207
granulosa