মেয়েদের সাধারণত কত থেকে কত বছর বয়স পর্যন্ত গর্ভধারণ ক্ষমতা থাকে ?
Female fertility is affected by age. Age is thus a major fertility factor for women. Menarche, the first menstrual period, usually occurs around 12–13, although it may happen earlier or later, depending on each girl. After puberty, female fertility increases and then decreases, with advanced maternal age causing an increased risk of female infertility. 
12–13