{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,11,13]],"date-time":"2023-11-13T00:03:16Z","timestamp":1699833796857},"reference-count":35,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2005,6,1]],"date-time":"2005-06-01T00:00:00Z","timestamp":1117584000000},"content-version":"vor","delay-in-days":8886,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Exp. Zool."],"published-print":{"date-parts":[[1981,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Cyclic female hamsters were rendered anovulatory by daily subcutaneous melatonin injections (25 \u03bcg\/0.1 ml oil) in 29 days or by transfer to a short light cycle, LD 6:18 (lights 1000\u20101600 hrs) in 33 days. Estrous cyclicity was reinitiated in these animals in 44 or 45 days following cessation of melatonin injections or transfer to long light cycles (LD 14:10, lights 0600\u20102000 hrs), respectively. Exposure of both groups to LD 6:18 after reinitiation of estrous cyclicity caused a second cessation of ovulation in 75 (melatonin group) or 61 (short light cycle group) days. Thus, although both treatments disrupted estrous cyclicity for nearly 6 weeks, this was not sufficient to induce photorefractoriness (failure to respond to short light cycles with continued estrous cyclicity). Rather, every animal responded to LD 6:18 and ceased ovulating. Melatonin\u2010induced anovulatory hamsters showed daily gonadotropin release patterns identical to those reported in hamsters in other anovulatory states (lactating, prepubertal, and photoinduced anovulatory hamsters); that is, peak LH and FSH release at 1700 hrs daily.<\/jats:p>","DOI":"10.1002\/jez.1402150206","type":"journal-article","created":{"date-parts":[[2005,6,11]],"date-time":"2005-06-11T08:14:52Z","timestamp":1118477692000},"page":"173-178","source":"Crossref","is-referenced-by-count":10,"title":["The anovulatory hamster: A comparison of the effects of short photoperiod and daily melatonin injections on the induction and termination of ovarian acyclicity"],"prefix":"10.1002","volume":"215","author":[{"given":"Milton H.","family":"Stetson","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brian","family":"Hamilton","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2005,6]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1210\/endo-94-5-1295"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1210\/endo-95-1-195"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1210\/endo-96-4-928"},{"key":"e_1_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.568311"},{"key":"e_1_2_1_6_1","doi-asserted-by":"publisher","DOI":"10.1095\/biolreprod13.5.617"},{"key":"e_1_2_1_7_1","first-page":"29","article-title":"Gonadotropin release in female hamsters: Circadian pattern in lactating but not pregnant animals","volume":"21","author":"DiPinto M. 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