Age at Menarche and Age at First Sexual Intercourse: A Prospective Cohort Study

@article{Marino2013AgeAM,
  title={Age at Menarche and Age at First Sexual Intercourse: A Prospective Cohort Study},
  author={Jennifer L. Marino and S. Rachel Skinner and Dorota A. Doherty and Susan L. Rosenthal and Spring Chenoa Cooper Robbins and Jeffrey W. Cannon and Martha Hickey},
  journal={Pediatrics},
  year={2013},
  volume={132},
  pages={1028 - 1036}
}
OBJECTIVE: Younger age at menarche (AAM) may put girls at risk for earlier first sexual intercourse (FSI). Young age at FSI has far-reaching negative outcomes. We describe the longitudinal relationship between AAM and FSI in a large prospective birth cohort. METHODS: AAM was collected from 554 girls from the Western Australia (Raine) Pregnancy Cohort Study, prospectively from age 10 or retrospectively at age 14. Age at FSI was collected at ages 17 and 20. Cox regression models describe… 

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