BackgroundConducting IVF treatment in laboratory environment by using ARTechnologies in idiopathic infertility,which cannot be treated by both drug treatment and surgical treatment in Mongolia, and preparinglegal environment are the crucial issues in treating infertility. The study is theoretically and practicallysignificant to properly determine pregnancy rate and live birth rate after embryo transfer treatmentin Mongolia.GoalAim of the study is to determine pregnancy rate and live birth rate after IVF treatment in coupleshaving infertility problem.Objectives1. To determine pregnancy rate in conjunction with age factor after conducting In vitro fertilizationin laboratory environment in couples with infertility problem.2. To determine live birth rate after pregnancy in conjunction with age factor.Materials and MethodsThe information of 180 couples aged 22-46 y.o., who received IVF treatment in “Unimed International”hospital’s IVF Center between March 2014 and June 2015, has been used in this study. Pregnancyrate as well as live birth rate after in vitro fertilization treatment has been determined. Statistic datawere calculated by SPSS-20 and Microsoft office excel 2013.ResultsThe average age of 180 women treated by In vitro fertilization treatment was 35.21±5.1 y.o. Sortedby age group: aged ≤30 y.o. was 34 (18.8%), aged between 31-34 y.o. was 41 (22.7%), agedbetween 35-39 y.o. was 80 (44.4%) and aged ≥40 y.o. was 25 (13.8%). 71 (39.44%) of womentreated by In vitro fertilization became pregnant. Sorted by their age: aged ≤30 y.o. was 18 (52.9%),aged between 31-34 y.o. was 20 (48.7%), aged between 35-39 y.o. was 28 (35.0%) and aged ≥40y.o. was 5 (20.0%). Resulted live birth from pregnancy is 56 (78.8%). Sorted by their age: aged≤30 y.o. was 16 (88.8%), aged between 31-34 y.o. was 18 (90.0 %), aged between 35-39 y.o. was22 (78.5%) and aged ≥40 y.o. was 2 (40.0%). Multiple births from total live birth is 16 (28.57%),amongst them 14 (25.0%) were twin births and 2 (3.51%) of them had triplet birth.Conclusions:1. IVF treatment in laboratory environment by using ARTechnologies in idiopathic infertility, whichcannot be treated by both drug treatment and surgical treatment, have good results (averagepregnancy rate was 39.44%).2. Live birth rate from total pregnancy was 56 (78.8%).3. Multiple birth from total live birth is 16 (28.57%). 14 (25.0%) were twins and 2 (3.51%) weretriplets.4. The IVF success rate depends on variable factors such as maternal age, cause of infertility,embryo status, reproductive history and lifestyle factors.