title: The authors' reply.
authors.affiliation: 1 Leuven Institute for Fertility and Embryology, Leuven, Belgium 2 Department of Development and Regeneration, University Hospital Leuven Leuven, Belgium 3 Department of Gynaecology, Obstetrics and Urology, Sapienza, University of Rome Rome, Italy.
authors.forename: Ivo
authors.initials: I
authors.lastname: Brosens
authors.forename: Robert
authors.initials: R
authors.lastname: Pijnenborg
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Benagiano
mesh_terms: D016026:Bone Marrow Transplantation / Q000009:adverse effects*; D005260:Female; D006801:Humans; D016377:Organ Transplantation / Q000009:adverse effects*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000209:etiology*