SINGH, S.; TYAGI, P.; ANAND, D.; GUPTA, N.; GUPTA, R. A comparative study of efficacy and side effects of nifedipine with nifedipine along with dydrogesterone in management of preterm labor. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 12, n. 6, p. 1670–1674, 2023. DOI: 10.18203/2320-1770.ijrcog20231534. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/12934. Acesso em: 2 feb. 2026.