Narayanan Namboothiri G1 , Varghese Iybu Chacko2 , Anusha Rashmi3 , Shreyaswi Sathyanath4 , Manjula Anil5; Factors influencing age at menarche – a school based cross sectional study,Indian Journal Of Community Health / Vol 32 / Issue No 02 / Apr – Jun 2020