How did Draupadi became pregnant?

How did Draupadi became pregnant if she had to give a year to each pandav given that it needs 9 months to give birth? What sort of question is this ? Show some respect to Mata Draupadi - the blessed wife of the Pandavas and the incarnation of Swarga Lakshmi. Also, there was no 1 year rule. That exists only in the southern recession. The critical edition makes no mention of any 1 year rule. This is what Narada told the Pandavas - When Krishna had left, the illustrious rishi told the Pandavas, with Yudhishthira at their head, “The immensely famous daughter of Panchala is a single wife to all of you, in accordance with dharma. You must lay down a rule among yourselves, lest there be dissension. In ancient times, there were two asura brothers named Sunda and Upasunda who were famous in the three worlds. They were always together and were incapable of being killed by anyone else, except each other. They ruled over the same kingdom. They lived in the same house. They slept on the same bed. They sat in the same seat. They ate off the same plate. But they killed each other over Tilottama. O Yudhishthira! Therefore, seek to protect the friendship you have for each other and act so that there is no dissension amongst you.” 200, Arjuna-Vanavasa parva, Mahabharata. Narada simply reminded the Pandavas to make a rule relating to Draupadi so that there is no conflict among brothers. 2. This is what the Pandavas decided - Vaishampayana said, ‘O, king! Having been thus addressed by the great-souled maharshi Narada, they consulted with each other and arrived at a rule, in the infinitely energetic devarshi Narada’s presence. If any one of them set eyes on Droupadi when she was lying with any one of the others, he would retire to the forest and live the life of a brahmachari for twelve years. After the Pandavas, who always followed dharma, had established this rule, the great sage Narada was happy and went where he wished to go. O, descendant of the Bharata lineage! In earlier times, thus requested by Narada, they established a rule and no dissension arose between them.’ 204, Arjuna - Vanavasa parva, Mahabharata. This is the only thing Pandavas decided. If Draupadi is with one of the Pandavas, if any of the other brothers approach her at that time then he has to go on an exile. There is no mention of any 1 year time period.