the world record for the longest time between the

The world record for the longest time between the birth of two twins is 87 days. The first of the Elliott twins was born 4 months early while her sister remained in the womb for another ~3 months. 

– WTF Fun Fact

Source: https://www.huffingtonpost.co.uk/2013/04/30/twins-born-87-days-apart-ireland-guiness-record_n_3186135.html