Regulation of steroidogenesis in cultured porcine theca cells by growth factors.

Growth factors [insulin-like growth factors (IGF-I, IGF-II), transforming growth factor-beta (TGF beta), epidermal growth factors (EGF)], found in the ovary and known to alter granulosal function, were assessed for their ability to modulate porcine thecal steroidogenesis. Theca cells from large porcine follicles (8-10 mm) were plated (5 x 10(5) cells/ml.well) in serum-free M199, treated with increasing doses of growth factors: IGF-1 (0.

[Male infertility and medically assisted procreation].

Three hundred thirty patients underwent in vitro fertilization in our centre since 1985. Fifty two percent of them presented an abnormal spermogram (sperm count less than or equal to 20 X 10/ml; mobility less than 40%; teratospermia greater than 60%). In those cases, lack of fertilization is statistically increased but pregnancy rate per transfer is similar to this observed with pure female cases.