Investigation on the age of menarche and its related factorsinsecondary school girl students in Birjand-Iran. Kateb Journal of Medical Science & Biotechnology , [S. l.], v. 1, n. 2, 2026. DOI: 10.66943/kjmsb.v1i2.85. Disponível em: https://kjmsb.kateb.edu.af/index.php/JMSB/article/view/85. Acesso em: 25 aug. 2026.