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Abstract
This study examines trends in proximate determinants of fertility in Zimbabwe and Kenya. Findings from the four Demographic and Health Surveys conducted in these countries show that the dramatic fall in fertility in these countries is consistent with the underlying trends in the most important proximate determinants of fertility. In Zimbabwe, contraceptive use far exceeds other proximate determinants in influencing fertility levels and trends. The results show that the fertility inhibiting effects of contraception are more important than the effects of post‐partum infecundability, marriage patterns, or sterility. The results also show that contraceptive use has its greatest suppressing effects in the middle and younger age groups. However, in Kenya, the dominant fertility inhibiting effect is postpartum infecundability, with contraception coming in second.