We examined antiimplantation effect of ethanol extract from ripening burahol flesh(Stelechocarpus burahol Hook f. & Thomson) using doses 1g and 0.5g per Kg BodyWeight (BW) on White Female Rats Wistar Strain. The ethanol extract was givenorally on daily basis from diestrus phase until 7th day of pregnancy. Two parameterused in this investigation were number of implants and number of born fetus. Thefetus were examined by observing their morphology to identify the existence of teratogeniceffect. The result showed that the two doses reduced both the number of implantsand born fetus significantly. In addition, the burahol flesh as an antifertilityagent has two functions: as antiimplantation and abortifacient. Lastly morphologicalexamination on the fetus did not show any teratogenic effect.