SHAHEEN, A.; CHAUHAN, N.; ALKA, A.; NAUTIYAL, R. An observational study of aetiology of preterm labour in a tertiary health care centre. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 11, n. 7, p. 1970–1973, 2022. DOI: 10.18203/2320-1770.ijrcog20221678. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/11811. Acesso em: 4 dec. 2025.