ABSTRACT
Survival of the semi allogeneic fetus in uterus without rejection is an immunological paradox . The antigenic dissimilarity is pronounced when XX mother Carries an XY fetus Pervious birth of a boy negatively affects the obstetrical future in female where these has been a supposed failure of immunological tolerance of pregnancy. Out of all the obstetrical complication assessed, IUGR turned out to be the most strongly associated with pervious Male Baby. PIH turned out to be the most common complication associated with pregnancy. Rate of LBW was also significantly more in women with previous male child. Oligo - hydromnios was also found to be significantly associated with history of having previous male child. PROM was also seen more frequently in cases that had a preceding male child. Pre -Eclampsia was also significantly associated with history of having a previous male child. A total of 1350 cases were studied. As expected, 64.89% of the cases included in the study went uneventful. There were 22.52 % vs. 12.59% eventful pregnancies in women with previous male and previousfemale child respectively (p = 0.0001).27.04% pregnancies went uneventful in women with previous male compared to 37.85% in women with previous female child (p = 0.0001).The study clearly shows that there is a lesser predilection of obstetrical mishaps happening to women whose first child is a female compared to those who have a previous male child.