Gandhari conceived. But for two years there were no signs of deliverance.
In the meantime Kunti gave birth to Yudhisthira.
The gestation period had prolonged a bit too long.
Envious that her younger sister in law was already a mother, she struck her womb with great force, in frustration.
A hard mass of flesh like a ball, came out. It was about to be thrown away.
But Grandfather Ved Vyas who had blessed his daughter in law, with hundred sons instructed thus,
“That ball of flesh then, sprinkled over with water, became, in time, divided into a hundred and one parts, each about the size of the thumb. These were then put into those pots full of clarified butter that had been placed at a concealed spot and were watched with care.“
The pots were uncovered exactly after two years.
“Then in time, king Duryodhana was born from among those pieces of the ball of flesh that had been deposited in those pots.”
Hundred sons and one daughter Dussala, were the test tube babies of Dhritrashtra.
Source : K M Ganguli’s Mahabharat.