This paper attempts to formulate Inverse Gaussian probability model to describe the distribution of the age specific
fertility rates among Nepalese mothers. The average age of child bearing has been found to be 26.12 years whereas
child bearing starts at the age of 15.82 years. Estimated total fertility rate (TFR) has been found to be 2.60 against the
observed value of 2.6 per woman. The coefficient of determination and chi-square values suggest that the model found
to be good fit to the Nepal Demographic and Health Surveys data. Findings may help researchers and policy makers for
applying the model in order to obtain the descriptive statistics for policy interventions.