<prompt> Recurrent aboion occurs in a woman, USG abdomen shows a non-echoic region in the central pa of the uterus. What is the probable diagnosisArcuate uterusSeptate uterusBicornuate uterusUnicornuate uterus  <response>: Septate uterus is most common It causes about 25 of spontaneous first trimester aboions 6 second trimester aboions Ref: Shaw Gynecology 17 e pg 72. 