MEAN AGE OF MENARCHE AND THE PROBABILITY OF ATTAINING MENARCHE FOR NIGERIAN GIRLS

Different menarcheal ages have been reported in Nigeria. This work estimated the mean of age at menarche (MAM) in Nigeria from analysis of a systematic review of published articles that reported different MAMs. The MAM and median ages of menarche were estimated to be 13.54 and 13.44, with a standard deviation of 0.83. The mean age of menarche obtained was imputed in the probability density function (PDF) of the Poisson distribution which yielded probability of attaining menarche at 8 to 18 years. The result will present information for management and counselling of girls during menarcheal stages of their lives