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In vitro induction of ovulation and oocyte maturation in Rana pipiens ovarian follicles: Effects of steroidal and nonsteroidal hormones by Allen W. Schuetz is a Environmental Science article available to read on EtoBox.
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Individual ovarian follicles of Rana pipiens respond to hormonal stimuli in vitro. The relative effectiveness of progesterone and gonadotrophic hormones in initiating ovulation and oocyte maturation were compared. Maturation of oocytes ( > 99%) with limited concomitant ovulation resulted following treatment of follicles with progesterone. Frog pituitary tissue was less effective than progesterone in stimulating maturation, but was more effective in producing ovulation. Neither ovulation nor maturation was stimulated in response to the mammalian gonadotrophic hormones (FSH, LTH, PMS, HCG) or mammalian growth hormone. Mammalian LH produced both ovulation and maturation; furthermore, no synergistic interaction with FSH was observed. Maturation did not occur in response to the gonadotrophic hormones without a concomitant, but not necessarily equivalent, induction of ovulation. Follicular responsiveness, particularly to gonadotrophic hormones, was affected by animal and seasonal variations. Structural changes (follicular membrane detachment from the oocyte) were observed in unovulated follicles treated with hormones. The structural alterations were closely correlated with the induction
Who reads In vitro induction of ovulation and oocyte maturation in Rana pipiens ovarian follicles: Effects of steroidal and nonsteroidal hormones?
It is typically read by researchers, students, and practitioners in Environmental Science.
- Author
- Allen W. Schuetz
- Publisher
- John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0022-104X)
- Published
- 1971
- Language
- EN
- Field
- Environmental Science (Life Sciences)