{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2022,3,31]],"date-time":"2022-03-31T12:41:17Z","timestamp":1648730477841},"reference-count":16,"publisher":"Cambridge University Press (CUP)","issue":"1","license":[{"start":{"date-parts":[[2014,8,1]],"date-time":"2014-08-01T00:00:00Z","timestamp":1406851200000},"content-version":"unspecified","delay-in-days":11170,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Acta genet. med. gemellol.: twin res."],"published-print":{"date-parts":[[1984,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Records of two hospitals and of an association of mothers of twins were analysed for the years 1924-1980, finding a total of 656,109 and 1185 twin births, respectively. Twinning rates were higher in summer or fall, in general, but these seasonal variations occasionally changed within a short period of years, as in 1973-75 in the Association group. The twinning rate was also affected by the month of mother's birth. It was low among the mothers born around May-July in maternities up to 1960, and these mothers did not show seasonal variation of twin births. The unlike-sexed twinning rate of the mothers born in May-July was also lower than that of the other mothers, and constantly low even at higher maternal ages. A possible explanation for these phenomena is discussed.<\/jats:p>","DOI":"10.1017\/s0001566000007601","type":"journal-article","created":{"date-parts":[[2016,7,27]],"date-time":"2016-07-27T09:57:54Z","timestamp":1469613474000},"page":"125-130","source":"Crossref","is-referenced-by-count":12,"title":["Twinning Rate by Month of Mother's Birth in Japan"],"prefix":"10.1017","volume":"33","author":[{"given":"T.","family":"Miura","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"I.","family":"Nakamura","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.","family":"Shimura","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"K.","family":"Nonaka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Y.","family":"Amau","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2014,8,1]]},"reference":[{"key":"S0001566000007601_ref009","first-page":"175","article-title":"Epidemiology of twin births from a climatic point of view","volume":"30","author":"Kamimura","year":"1976","journal-title":"Br J Prev Soc Med"},{"key":"S0001566000007601_ref010","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.1960.tb09255.x"},{"key":"S0001566000007601_ref014","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.1973.tb16043.x"},{"key":"S0001566000007601_ref016","first-page":"95","volume-title":"Twin Research 3: Part A, Twin Biology and Multiple Pregnancy","author":"Wyshak","year":"1981"},{"key":"S0001566000007601_ref013","doi-asserted-by":"publisher","DOI":"10.1007\/BF02133800"},{"key":"S0001566000007601_ref007","doi-asserted-by":"publisher","DOI":"10.1080\/03014467600001321"},{"key":"S0001566000007601_ref015","first-page":"135","article-title":"Multiple pregnancies and photoperiodicity","volume":"57","author":"Timonen","year":"1968","journal-title":"Ann Chir Gynaecol Fenn"},{"key":"S0001566000007601_ref012","doi-asserted-by":"publisher","DOI":"10.1007\/BF02245548"},{"key":"S0001566000007601_ref004","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.1978.tb14893.x"},{"key":"S0001566000007601_ref003","doi-asserted-by":"publisher","DOI":"10.1038\/142357a0"},{"key":"S0001566000007601_ref001","first-page":"1","volume-title":"Twin Research 3: Part A, Twin Biology and Multiple Pregnancy","author":"Allen","year":"1981"},{"key":"S0001566000007601_ref005","first-page":"125","article-title":"Die jahreszeitlichen Schwankungen der H\u00e4ufigkeit von Mehrlingskonzeptionen in Wandel zweier Jahrhunderte","volume":"38","author":"Hoffmann","year":"1978","journal-title":"Geburtshilfe Frauenheilkd"},{"key":"S0001566000007601_ref002","doi-asserted-by":"publisher","DOI":"10.1017\/S1120962300024732"},{"key":"S0001566000007601_ref006","doi-asserted-by":"publisher","DOI":"10.1007\/BF01901731"},{"key":"S0001566000007601_ref008","doi-asserted-by":"publisher","DOI":"10.1080\/03014468000004191"},{"key":"S0001566000007601_ref011","doi-asserted-by":"publisher","DOI":"10.1007\/BF02109950"}],"container-title":["Acta geneticae medicae et gemellologiae: twin research"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0001566000007601","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,5,23]],"date-time":"2019-05-23T21:40:09Z","timestamp":1558647609000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0001566000007601\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1984,1]]},"references-count":16,"journal-issue":{"issue":"1","published-print":{"date-parts":[[1984,1]]}},"alternative-id":["S0001566000007601"],"URL":"https:\/\/doi.org\/10.1017\/s0001566000007601","relation":{},"ISSN":["0001-5660","2059-6324"],"issn-type":[{"value":"0001-5660","type":"print"},{"value":"2059-6324","type":"electronic"}],"subject":[],"published":{"date-parts":[[1984,1]]}}}