As well as a study in Thailand found that the mean age at menarche, first in the range of 12.1 to 12.5 years in line with national health survey report by monitoring body, Thailand Thailand found that women with early puberty. The mean age at menarche fell in the age group 15-29 years, the average age of menarche was 13.2 years, while the age group 30-44 years and 45-59 years from first menstruation at an average age of 14.1. years and 14.8 years, respectively
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