SADIQ, M. E.; ABUBAKAR, A. L.; LAWAL, A.; AHMAD, A. H.; SADA, N. Preterm deliveries and progesterone levels in pregnant women attending antenatal care in a health care facility in Sokoto state, Nigeria: a preliminary study. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 9, n. 7, p. 2969–2972, 2020. DOI: 10.18203/2320-1770.ijrcog20202742. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/8553. Acesso em: 3 oct. 2025.