title: Should embryo transfer always be performed under ultrasound guidance?
authors.forename: H N
authors.initials: HN
authors.lastname: Sallam
mesh_terms: D004624:Embryo Transfer; D005260:Female; D006801:Humans; D011247:Pregnancy / Q000706:statistics & numerical data*; D018084:Ultrasonography, Interventional / Q000379:methods*; D016216:Ultrasonography, Prenatal / Q000379:methods*