title: The search for improved in-vitro systems should not be ignored: embryo co-culture may be one of them.
authors.affiliation: Department of Obstetrics & Gynaecology, National University of Singapore, National University Hospital.
authors.forename: A
authors.initials: A
authors.lastname: Bongso
authors.forename: C Y
authors.initials: CY
authors.lastname: Fong
authors.forename: S C
authors.initials: SC
authors.lastname: Ng
authors.forename: S
authors.initials: S
authors.lastname: Ratnam
mesh_terms: D046508:Culture Techniques; D004622:Embryo, Mammalian / Q000502:physiology*; D005314:Embryonic and Fetal Development; D005260:Female; D005328:Fetal Viability; D006801:Humans; D014599:Uterus / Q000502:physiology