Overview: It is increasing of the late and sex elected abortion resulted sex unbalance. Objective: understanding the reasons, effectiveness and side effects of Misoprostol (MSP) on late abortion. Method clinical trial study with 154 pregnats women at National Hospital of Obstetric and Gynecology from February to September of 2008. Result: abortion cause of unmarried: 48.05 percent
abnormal pregnancies: 27.92 percent
sex elected: 18.18 percent
unwanted pregnancies is 1.95 percent. The rate of the dose 200 mcg/4 times /24h, the rate of abortion is 95.45 percent in which 48 first hours is 78.91 percent. The side effect is little and no need to treatment. There is not any complication. Conclusion: The rate of sex elected abortion (female) is too height. The total dose 800 mcg of MSP, inserting vagina, the rate of success is height and there is not side effective or complications.