{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,17]],"date-time":"2026-08-17T12:57:21Z","timestamp":1786971441086,"version":"build-2736575974"},"reference-count":64,"publisher":"Oxford University Press (OUP)","issue":"3","license":[{"start":{"date-parts":[[2023,1,27]],"date-time":"2023-01-27T00:00:00Z","timestamp":1674777600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"funder":[{"DOI":"10.13039\/100007231","name":"Cornell University","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100007231","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["R01-HD0937848"],"award-info":[{"award-number":["R01-HD0937848"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["T32-DK007158"],"award-info":[{"award-number":["T32-DK007158"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000024","name":"Canadian Institutes of Health Research","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100000024","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,3,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>STUDY QUESTION<\/jats:title><jats:p>Are ovarian antral follicle dynamics altered in women with obesity and regular ovulatory cycles?<\/jats:p><\/jats:sec><jats:sec><jats:title>SUMMARY ANSWER<\/jats:title><jats:p>Eumenorrheic women with obesity display evidence of suppressed antral follicle dynamics as judged by fewer recruitment events, selectable follicles, and anovulatory dominant follicles, as well as lower anti-M\u00fcllerian hormone (AMH) concentrations and an increased prevalence of luteal phase defects.<\/jats:p><\/jats:sec><jats:sec><jats:title>WHAT IS KNOWN ALREADY<\/jats:title><jats:p>Ovarian antral follicle development is a dynamic process involving distinct follicular and endocrine events that are critical for the occurrence of regular monthly ovulations. Follicle dynamics have not been prospectively evaluated in eumenorrheic women with obesity despite the known impact of obesity on gonadotropin production, ovarian steroid hormone concentrations, and fecundity.<\/jats:p><\/jats:sec><jats:sec><jats:title>STUDY DESIGN, SIZE, DURATION<\/jats:title><jats:p>This was a prospective, longitudinal study of 42 women conducted over one inter-ovulatory interval (IOI).<\/jats:p><\/jats:sec><jats:sec><jats:title>PARTICIPANTS\/MATERIALS, SETTING, METHODS<\/jats:title><jats:p>A group of 21 women with obesity (total percent body fat \u226535%) and a group of 21 women without obesity (total percent body fat &amp;lt;35%) underwent transvaginal ultrasonography and venipuncture every-other-day for one IOI at an academic clinical research unit. Participants were aged 19\u201338\u2009years and had a history of self-reported regular menstrual cycles (21\u201335\u2009days). Follicle number and diameter (\u22652\u2009mm) were quantified at each visit. Individual growth profiles for all follicles that grew to \u22657\u2009mm were assessed. Blood samples were assayed for gonadotropins, AMH, estradiol, and progesterone.<\/jats:p><\/jats:sec><jats:sec><jats:title>MAIN RESULTS AND THE ROLE OF CHANCE<\/jats:title><jats:p>Women with obesity exhibited fewer recruitment events (mean \u00b1 SD, 1\u2009\u00b1\u20091 vs 2\u2009\u00b1\u20091 events; P\u2009=\u20090.010) and fewer selectable follicles (4\u2009\u00b1\u20093 vs 8\u2009\u00b1\u20096 follicles per participant; P\u2009=\u20090.022) during an IOI compared to women without obesity. AMH levels were lower in women with obesity (4.40\u2009\u00b1\u20093.01 vs 5.94\u2009\u00b1\u20092.49\u2009ng\/ml; P\u2009=\u20090.023), while gonadotropin profiles were similar between groups, across the IOI. Of the individual follicles tracked, fewer follicles progressed to &amp;gt;10\u2009mm in the cohort with obesity (30 vs 40 follicles; P\u2009=\u20090.04) and fewer anovulatory follicles achieved dominance (9 vs 18 follicles; P\u2009=\u20090.041). Ovulatory follicles were selected at smaller diameters in women with compared to those without obesity (7.5\u2009\u00b1\u20091.6 vs 9.5\u2009\u00b1\u20091.9\u2009mm; P\u2009=\u20090.001). Luteal phase defects were also more common in women with compared to those without obesity, as defined by either integrated (76 vs 29%, P\u2009=\u20090.002) or maximum (71 vs 24%, P\u2009=\u20090.002) luteal progesterone.<\/jats:p><\/jats:sec><jats:sec><jats:title>LIMITATIONS, REASONS FOR CAUTION<\/jats:title><jats:p>This study was limited to an assessment of antral follicle dynamics and cannot inform on earlier stages of folliculogenesis. This study was observational and cannot address causation between obesity and altered antral follicle dynamics. Lastly, the data cannot be extrapolated to account for reduced fecundity and fertility in obesity.<\/jats:p><\/jats:sec><jats:sec><jats:title>WIDER IMPLICATIONS OF THE FINDINGS<\/jats:title><jats:p>The increasing global prevalence of obesity necessitates an understanding of the mechanisms that underlie obesity-related adverse reproductive health outcomes. Eumenorrheic women with obesity demonstrate altered ovarian antral follicle and endocrine dynamics compared to their counterparts without obesity. The degree to which abnormal granulosa cell assembly and\/or activity underlie the suboptimal luteinization and subfertility requires further investigation.<\/jats:p><\/jats:sec><jats:sec><jats:title>STUDY FUNDING\/COMPETING INTEREST(S)<\/jats:title><jats:p>Funding was provided by Cornell University, President\u2019s Council of Cornell Women, United States Department of Agriculture (grant no. 8106), and National Institutes of Health (R01-HD0937848). B.Y.J. and H.V.B. were supported by doctoral training awards from the National Institutes of Health (T32-DK007158) and Canadian Institutes of Health Research (grant no. 146182), respectively.<\/jats:p><\/jats:sec><jats:sec><jats:title>TRIAL REGISTRATION NUMBER<\/jats:title><jats:p>NCT01927432, NCT01785719<\/jats:p><\/jats:sec>","DOI":"10.1093\/humrep\/dead007","type":"journal-article","created":{"date-parts":[[2023,1,28]],"date-time":"2023-01-28T07:48:53Z","timestamp":1674892133000},"page":"459-470","source":"Crossref","is-referenced-by-count":22,"title":["Obesity is associated with alterations in antral follicle dynamics in eumenorrheic women"],"prefix":"10.1093","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4511-3514","authenticated-orcid":false,"given":"Alexis L","family":"Oldfield","sequence":"first","affiliation":[{"name":"Division of Nutritional Sciences, Cornell University , Ithaca, NY, 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