{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,27]],"date-time":"2025-11-27T10:51:51Z","timestamp":1764240711505,"version":"3.40.5"},"reference-count":35,"publisher":"Cambridge University Press (CUP)","issue":"6","license":[{"start":{"date-parts":[[2023,11,23]],"date-time":"2023-11-23T00:00:00Z","timestamp":1700697600000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["cambridge.org"],"crossmark-restriction":true},"short-container-title":["Twin Res Hum Genet"],"published-print":{"date-parts":[[2023,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Female fertility is a complex trait with age-specific changes in spontaneous dizygotic (DZ) twinning and fertility. To elucidate factors regulating female fertility and infertility, we conducted a genome-wide association study (GWAS) on mothers of spontaneous DZ twins (MoDZT) versus controls (3273 cases, 24,009 controls). This is a follow-up study to the Australia\/New Zealand (ANZ) component of that previously reported (Mbarek et al., 2016), with a sample size almost twice that of the entire discovery sample meta-analysed in the previous article (and five times the ANZ contribution to that), resulting from newly available additional genotyping and representing a significant increase in power. We compare analyses with and without male controls and show unequivocally that it is better to include male controls who have been screened for recent family history, than to use only female controls. Results from the SNP based GWAS identified four genomewide significant signals, including one novel region, <jats:italic>ZFPM1<\/jats:italic> (Zinc Finger Protein, FOG Family Member 1), on chromosome 16. Previous signals near <jats:italic>FSHB<\/jats:italic> (Follicle Stimulating Hormone beta subunit) and <jats:italic>SMAD3<\/jats:italic> (SMAD Family Member 3) were also replicated (Mbarek et al., 2016). We also ran the GWAS with a dominance model that identified a further locus <jats:italic>ADRB2<\/jats:italic> on chr 5. These results have been contributed to the International Twinning Genetics Consortium for inclusion in the next GWAS meta-analysis (Mbarek et al., in press).<\/jats:p>","DOI":"10.1017\/thg.2023.45","type":"journal-article","created":{"date-parts":[[2023,11,23]],"date-time":"2023-11-23T08:46:12Z","timestamp":1700729172000},"page":"327-338","update-policy":"https:\/\/doi.org\/10.1017\/policypage","source":"Crossref","is-referenced-by-count":3,"title":["GWAS of Dizygotic Twinning in an Enlarged Australian Sample of Mothers of DZ Twins"],"prefix":"10.1017","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7623-328X","authenticated-orcid":false,"given":"Scott D.","family":"Gordon","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"David L.","family":"Duffy","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"David 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