Hamdi Mbarek, Scott D Gordon, David L Duffy, Nikki Hubers, Sally Mortlock, Jeffrey J Beck, Jouke-Jan Hottenga, René Pool, Conor V Dolan, Ky'Era V Actkins, Zachary F Gerring, Jenny Van Dongen, Erik A Ehli, William G Iacono, Matt Mcgue, Daniel I Chasman, C Scott Gallagher, Samantha L P Schilit, Cynthia C Morton, Guillaume Paré, Gonneke Willemsen, David C Whiteman, Catherine M Olsen, Catherine Derom, Robert Vlietinck, Daniel Gudbjartsson, Lisa Cannon-Albright, Eva Krapohl, Robert Plomin, Patrik K E Magnusson, Nancy L Pedersen, Pirro Hysi, Massimo Mangino, Timothy D Spector, Teemu Palviainen, Yuri Milaneschi, Brenda W Penninnx, Adrian I Campos, Ken K Ong, John R B Perry, Cornelis B Lambalk, Jaakko Kaprio, Ísleifur Ólafsson, Karine Duroure, Céline Revenu, Miguel E Rentería, Loic Yengo, Lea Davis, Eske M Derks, Sarah E Medland, Hreinn Stefansson, Kari Stefansson, Filippo Del Bene, Bruno Reversade, Grant W Montgomery, Dorret I Boomsma, Nicholas G Martin
STUDY QUESTION: Which genetic factors regulate female propensity for giving birth to spontaneous dizygotic (DZ) twins? SUMMARY ANSWER: We identified four new loci, GNRH1, FSHR, ZFPM1, and IPO8, in addition to previously identified loci, FSHB and SMAD3. WHAT IS KNOWN ALREADY: The propensity to give birth to DZ twins runs in families. Earlier, we reported that FSHB and SMAD3 as associated with DZ twinning and female fertility measures. STUDY DESIGN, SIZE, DURATION: We conducted a genome-wide association meta-analysis (GWAMA) of mothers of spontaneous dizygotic (DZ) twins (8265 cases, 264 567 controls) and of independent DZ twin offspring (26 252 cases, 417 433 controls)...
December 5, 2023: Human Reproduction