Recent trends in Tanzanian fertility.

This paper provides an assessment of the nature and magnitude of Tanzania's recent fertility decline, using robust methods for the identification of fertility trends. A decline in Tanzanian fertility began some time in the late 1970s or early 1980s. The pattern of decline exhibits similarities to patterns identified some years ago in Zimbabwe and Kenya. The decline has been especially marked in urban areas. It has been accompanied by a rapid rise in contraceptive prevalence from the very low levels before 1990 to just under 20 per cent of currently married women of reproductive age. Although falling marital fertility associated with a rise in contraceptive use is the main contributor to the decline in fertility, a rise in the average age at marriage has also made a (smaller) contribution, as has the AIDS epidemic. The fact that fertility is declining in Tanzania raises questions about the social and economic requirements for fertility transitions to begin in sub-Saharan Africa.