SHREE, A.; A. K., C. Evaluation of uterine cervix with transvaginal ultrasonography in women with threatened preterm labor and or preterm labor. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 7, n. 2, p. 704–709, 2018. DOI: 10.18203/2320-1770.ijrcog20180198. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/4096. Acesso em: 28 oct. 2025.