COLLETTO, G. M. D. D.; SEGRE, C. A. de M.; BEIGUELMAN, B. Twinning rate in a sample from a Brazilian hospital with a high standard of reproductive care. São Paulo Medical Journal, [S. l.], v. 119, n. 6, p. 216–219, 2001. Disponível em: https://periodicosapm.emnuvens.com.br/spmj/article/view/2785. Acesso em: 16 oct. 2025.