title: Age of menarche in pigtail monkeys (Macaca nemestrina): a cross-sectional survey of perineal tumescence.
mesh_terms: D000367:Age Factors; D000818:Animals; D001835:Body Weight; D005260:Female; D008251:Macaca / Q000502:physiology*; D008572:Menarche; D010502:Perineum / Q000502:physiology*; D011247:Pregnancy