Ssn. Lee et Tt. Lao, CORD-BLOOD THYROTROPIN AND FETAL PRESENTATION AT DELIVERY IN SINGLETON PREGNANCIES, Gynecologic and obstetric investigation, 43(2), 1997, pp. 94-97
Cord blood thyrotrophin (TSH) levels of 134 patients with singleton pr
egnancies and breech presentation at delivery were compared with those
of cephalic-presenting controls matched for mode of delivery, the pre
sence of labour, parity, and the date of delivery. Infants delivered b
y vaginal breech delivery were found to have a higher incidence of ele
vated 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 con
genital hypothyroidism screening.