This study aimed is at assessing the impact of voluntary counseling and testing for HIV on family planning in a setting of high HIV prevalence and high TFR. An intervention study was conducted between January and March 2004 among women who had been counseled about HIV, STI and contraception during pregnancy followed with voluntary HIV testing. 121 HIV positive and 206 HIV negative attending antenatal clinic aged 24.6 ± 5.4 years (range 17 - 36 years) participated in this study. The independent and significant (P < 0.01) determinants of future fertility after current pregnancy were HIV sero-negative status (OR = 7.9 95% CI 4 - 16.1), monogamy (OR = 2.795 CI 1.2 - 5.5), ideal family size as = 4 children (OR = 2.7 95% CI 1.3 - 5.5) and current number of live children = 0 (OR 5.8 95% CI 3.1 - 10). Knowledge of HIV serostatus had significant impact on ideal family size, but no impact on the choice of contraception method.