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However, in poor\u2010responder patients, where only very few follicles can be recruited and very few oocytes, if any, can be retrieved after controlled ovarian hyperstimulation, natural IVF cycles may offer a comparable number of follicles, reduced costs, and less discomfort for the patients. In this group of patients, natural IVF cycle is a cost\u2010effective approach.<\/jats:p>","DOI":"10.1196\/annals.1335.026","type":"journal-article","created":{"date-parts":[[2005,2,24]],"date-time":"2005-02-24T17:01:10Z","timestamp":1109264470000},"page":"245-251","source":"Crossref","is-referenced-by-count":16,"title":["Natural <i>In Vitro<\/i> Fertilization Cycles"],"prefix":"10.1111","volume":"1034","author":[{"given":"FILIPPO","family":"UBALDI","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"LAURA","family":"RIENZI","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"SUSANNA","family":"FERRERO","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"ELENA","family":"BARONI","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"MARCELLO","family":"IACOBELLI","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"FABIO","family":"SAPIENZA","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"MARIA GIULIA","family":"MINASI","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"LUIGI","family":"COBELLIS","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"STEFANIA","family":"ROMANO","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"FILOMENA","family":"SCARSELLI","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"ERMANNO","family":"GRECO","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2006,1,12]]},"reference":[{"key":"e_1_2_5_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(78)92957-4"},{"key":"e_1_2_5_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0015-0282(16)55430-2"},{"key":"e_1_2_5_4_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.1993.tb12985.x"},{"key":"e_1_2_5_5_2","doi-asserted-by":"crossref","first-page":"2459","DOI":"10.1093\/humrep\/16.11.2459","article-title":"Assisted reproductive technology in Europe, 1998\u2014results generated from European registers by ESHRE: European Society of Human Reproduction and Embryology","volume":"16","author":"Nygren K.G.","year":"2001","journal-title":"Hum. 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