TEMPO AND QUANTUM OF FERTILITY IN TEHRAN

Abstract

In this study two indices of tempo and quantum of fertility for the city of Tehran are calculated. The tables are based on data which have been collected in a survey in 1986. The sampling was administrated at two stages. At the beginning 158 geographical points were considered (the number of first birth order during 24 hours in Tehran), then on the first stage 17 random geographical points were selected from 158 first birth order by systematic sampling. On the second stage, one month after neonate’s birth, around each of the first random geographical points, 20 others women were selected in her neighborhood and their reproduction characteristics have been studied. Two indices which have been particularly discussed are the quantum and the tempo of fertility. The results show that the tempo of fertility from the marriage until the first birth order is equal to 17 months and for the higher berth’s order this figure is equal to 28 months for all women. The quantum of fertility for all women is about 90 percent for each birth order by the end of 72 months from the previous births.