The study investigates the relationship between age at marriage and th
e length of first birth interval in two states of India: Uttar Pradesh
and Kerala. Life tables of first-birth intervals and median first-bir
th intervals are computed for several subgroups of the study populatio
n. Multivariate hazards modelling technique is used to study the net e
ffect of age at marriage, controlling for a multiple of socioeconomic
factors. The result shows that the average first-birth interval varies
by age at marriage and is much longer in Uttar Pradesh than in Kerala
.