ABBEY, M.; GREEN, K. I. Admission cardiotocography versus Doppler auscultation of fetal heart in high risk pregnancies in a tertiary health facility in Nigeria. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 10, n. 9, p. 3268–3276, 2021. DOI: 10.18203/2320-1770.ijrcog20213439. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/10576. Acesso em: 13 oct. 2025.