Re: Fetal cardiac remodeling in twin pregnancy conceived by assisted reproductive technology. B. Valenzuela-Alcaraz, M. Cruz-Lemini, M. Rodriguez-Lopez, A. Gonce, L. Garcia-Otero, H. Ayuso, M. Sitges, B. Bijnens, J. Balasch, E. Gratacos and F. Crispi. Ult