. Control of ovulation; proceedings of the conference held at Endicott House, Dedham, Massachusetts, 1960. Ovulation -- Regulation. - 025 o S HOURS AFTER PROGESTERONE. I I LATENCY E V C V C E EVC V CEVE C V -ELECTRIC STIM, V-VAGINAL STIM., C-COITUS Fig. 9. Thresholds and EEG afterreaction data following estrogen and subsequently progesterone treatment of an intact (non-castrate) female rabbit. From Kawakami and Sawyer (43). seen in Fig. 9. On the day after the first injection of estrogen, the still anestrous rabbit reveals a lowered EEG afterreaction threshold to electrical stimulation. On the
. Control of ovulation; proceedings of the conference held at Endicott House, Dedham, Massachusetts, 1960. Ovulation -- Regulation. - 025 o S HOURS AFTER PROGESTERONE. I I LATENCY E V C V C E EVC V CEVE C V -ELECTRIC STIM, V-VAGINAL STIM., C-COITUS Fig. 9. Thresholds and EEG afterreaction data following estrogen and subsequently progesterone treatment of an intact (non-castrate) female rabbit. From Kawakami and Sawyer (43). seen in Fig. 9. On the day after the first injection of estrogen, the still anestrous rabbit reveals a lowered EEG afterreaction threshold to electrical stimulation. On the day following the second estrogen injection the EEG afterreaction threshold is depressed still further and the arousal threshold somewhat lowered. At this time, prior to treatment with progesterone, the now estrous rabbit copulates and reveals an EEG afterreaction which is not, however, fully evocable by vaginal stimulation. Progesterone lowers the thresholds still further and during the next few hours even vaginal stimulation induces the EEG afterreaction. Between six and eight hours after progesterone administration the afterreaction threshold rises sharply while the arousal threshold slopes upward gradually. Treatment of estrous rabbits with exogenous estrogen for two days or anestrous rabbits for four days lowered the threshold of pituitary activation to such an extent that ovulation could be induced in 40-50 % of the cases by. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University; Association for the Aid of Crippled Children; Villee, Claude Alvin, 1917-. New York, Symposium Publications Division, Pergamon Press
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