Multiple Multiple Birthings: A peasant from Shuya 150 miles from Moscow, the first wife of Feodor Vassileyev (b 1707) gave birth to 69 children in 27 confinements: 16 pairs of twins, seven sets of triplets and four sets of quadruplets.
Longest Interval: Diana Petrungaro was born on 22 December 1987. Her twin sister Monica was born 36 days later on 27 January 1988.
Shortest Interval: Bradley, Christopher and Carmon were born naturally to Mrs James E Duck of Memphis, Tennessee in 2 minutes in March 1977.
Heavyweight Record: 26lb 6oz in an Iranian case of 2 males and one female in 1968.
Growing old gracefully: The Guinness Book of Records estimates that the chances of identical twins both reaching 100 are now probably about one in 50 million.
Fast Breeder: The female meadow vole (Microtus agrestis) can reproduce from the age of 25 days and have up to 17 litters of 6-8 young in a year.