April 2026 in “International Journal of Drug Delivery Technology” Girls in Tamil Nadu typically start menstruating around age 12.84, influenced by lifestyle and family factors.
November 2025 in “Asian Journal of Medical Sciences” Early menarche may indicate higher risk of severe hirsutism in PCOS patients.
February 2022 in “Obstetrics and gynaecology cases - reviews” PCOS can cause unusual symptoms like late puberty and enlarged clitoris, making diagnosis difficult.
January 2025 in “BMC Pediatrics” Iranian girls in Isfahan typically start puberty around age 10, with menarche at 12.
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February 1980 in “Clinical Endocrinology” During puberty, hormone levels rise, with early increases in some steroids and most menstrual cycles becoming regular by six years after menarche.