Rickard, Ian J.; Vullioud, Colin; Rousset, François; Postma, Erik; Helle, Samuli; Lummaa, Virpi; Kylli, Ritva; Pettay, Jenni E.; Røskaft, Eivin; Skjærvø, Gine Roll; Störmer, Charlotte; Voland, Eckart; Waldvogel, Dominique; Courtiol, Alexandre (Peer reviewed; Journal article, 2022)
Historically, mothers producing twins gave birth, on average, more often than non-twinners. This observation has been interpreted as twinners having higher intrinsic fertility – a tendency to conceive easily irrespective ...