MEIYAPPAN, K.; DHIMAN, P.; RAJENDIREN, S.; THAYAGARAJAN, K.; RAGHAVAN S, S. Serum nitric oxide and homocysteine as biomarkers of ectopic pregnancy. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 4, n. 1, p. 66–70, 2017. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/1811. Acesso em: 14 oct. 2025.