[Menarche in schoolgirls in Novi Sad].

Out of 947 examined schoolgirls aged 8.5-15 from the two schools in Novi Sad, 327 of them had menarche. Arithmetic mean value of the appearance of menarche was 12.25 years, the standard deviation being 0.91 years. Median was 12.59 years. The normal appearance of menarche (X +/- 2 SD) ranged from 10.4-14.1 years in our environment. According to X2 (Chi-square) test and asymmetry coefficient (beta 1) it was pointed out that the distribution of menarche in examined schoolgirls was normal and symmetric.