The most children born to one woman is 69, by Valentina Vassilyeva, the wife of a Russian peasant named Feodor Vassilyev. She gave birth between 1725 and 1765 in 27 pregnancies, producing 16 sets of twins, 7 sets of triplets, and 4 sets of quadruplets
by Guinness World Records
by Guinness World Records

!! And some of them were twins, triplets and quadruplets! By my calculations (if I figured it right), and if she carried them all full term …she was pregnant 40.5 years of her life!