article 2008 Endometrial gene expression in the window of implantation is not altered in natural cycles in obese infertile women ·doi:10.1016/j.fertnstert.2008.07.185
article 2004 Hydrosalpinx and oocyte quality − A study in oocyte donation patients ·doi:10.1016/j.fertnstert.2004.07.910