Sultana had two uteruses, a condition called uterus didelphys.
A uterus didelphys is a rare congenital abnormality, and the occurrence of twin gestation has an overall incidence rate of 1 in a million, according to the National Institutes of Health.
Her first baby was conceived and grown in a different womb to that holding the twins.
Sultana was unaware of her condition and double-simultaneous pregnancy as she did not receive an ultrasound for the birth of her baby boy.
"It's a rare incident. I have seen such a case for the first time. I had not even heard about such an incident before," Poddar said.
It is understood the mother and babies are healthy and doing well.