title: Cord blood thyrotrophin and foetal presentation at delivery in singleton pregnancies.
abstract: Cord blood thyrotrophin (TSH) levels of 134 patients with singleton pregnancies and breech presentation at delivery were compared with those of cephalic-presenting controls matched for mode of delivery, the presence of labour, parity, and the date of delivery. Infants delivered by vaginal breech delivery were found to have a higher incidence of elevated cord blood TSH level than either cephalic-presenting infants or breech-presenting infants delivered by Caesarean section. We conclude that vaginal breech delivery can be associated with false positive congenital hypothyroidism screening.
authors.affiliation: Department of Obstetrics and Gynaecology, Tsan Yuk Hospital, Hong Kong.
authors.forename: S S
authors.initials: SS
authors.lastname: Lee
authors.forename: T T
authors.initials: TT
authors.lastname: Lao
mesh_terms: D001946:Breech Presentation; D002585:Cesarean Section; D005260:Female; D005312:Fetal Blood / Q000378:metabolism*; D006801:Humans; D007231:Infant, Newborn; D007746:Labor Presentation; D011247:Pregnancy; D013972:Thyrotropin / Q000378:metabolism*
chemical_list: D013972:Thyrotropin