I found this on yahoo answers
Mothers Day Trivia: Highest Recorded Number of Children
The highest officially recorded number of children born to one mother is 69, to the first wife of Feodor Vassilyev (1707-1782) of Shuya, Russia. Between 1725 and 1765, in a total of 27 confinements, she gave birth to 16 pairs of twins, seven sets of triplets, and four sets of quadruplets. 67 of them survived infancy.
Mothers Day Trivia: Highest Number of Children in Modern Times
The modern world record for giving birth is held by Leontina Albina from San Antonio, Chile. Leontina claims to be the mother of 64 children, of which only 55 of them are documented. She is listed in the 1999 Guinness World Records but dropped from later editions.