1 Centro Scienze Natalità, IRCCS Ospedale San Raffaele, Vita-Salute San Raffaele University, Via Olgettina, 60, 20132, Milan, Italy. desantis.lucia@hsr.it.
2 GynePro Medical Centers, NextClinics International, Via T. Cremona, 8, 40137, Bologna, Italy.
3 European Hospital, Center for Reproductive Medicine, Via Portuense 700, 00149, Rome, Italy.