title: Placental implantation and migration following a previous caesarean section scar.
abstract: This prospective cohort study was conducted in Arash Women's Hospital between August 2014 and August 2015 to define the relationship between caesarean section scar and placental implantation and migration. Seven hundred and thirty women with one previous birth (caesarean section or vaginal delivery) and a singleton pregnancy underwent three ultrasound examinations for placental evaluation at 11-14, 20 and 34 weeks gestation. Previous caesarean section was related to the increased odds of anterior placental implantation but no relation was seen between low-lying placenta or placenta praevia and previous caesarean. The placental migration from low-lying to non-low-lying position was similar between women with and without previous caesarean.
authors.affiliation: Department of Obstetrics and Gynecology, Arash Women's Hospital, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Reihaneh
authors.initials: R
authors.lastname: Pirjani
authors.affiliation: Department of Obstetrics and Gynecology, Arash Women's Hospital, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Farahnaz
authors.initials: F
authors.lastname: Seifmanesh
authors.affiliation: Department of Obstetrics and Gynecology, Arash Women's Hospital, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Afsaneh
authors.initials: A
authors.lastname: Tehranian
authors.affiliation: Research Development Center, Arash Women's Hospital, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Ladan
authors.initials: L
authors.lastname: Hosseini
authors.affiliation: School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Reza
authors.initials: R
authors.lastname: Heidari
authors.affiliation: School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Alireza
authors.initials: A
authors.lastname: Ghajar
authors.affiliation: Department of Epidemiology and Reproductive Health, Reproductive Epidemiology Research Center, Royan Institue for Reproductive Biomedicine, ACECR, Tehran, Iran.
authors.forename: Mahdi
authors.initials: M
authors.lastname: Sepidarkish
mesh_terms: D000328:Adult; D002585:Cesarean Section / Q000009:adverse effects; D002921:Cicatrix / Q000150:complications*; D010064:Embryo Implantation; D005260:Female; D006801:Humans; D010920:Placenta / Q000000981:diagnostic imaging*; D010929:Placentation; D011247:Pregnancy; D011446:Prospective Studies; D016216:Ultrasonography, Prenatal
keywords: caesarean scar; caesarean section; placenta migration; placental implantation