Reply to: Maternal capacity, twinning and fertility: the last birth matters

oleh: Alexandre Courtiol, Colin Vullioud, François Rousset, Erik Postma, Samuli Helle, Virpi Lummaa, Ritva Kylli, Jenni E. Pettay, Eivin Røskaft, Gine R. Skjærvø, Charlotte Störmer, Eckart Voland, Dominique Waldvogel, Ian J. Rickard