I have a friend whose daughter recently had twins...but not together! One of the twins was born last month and the other twin was born on Mothers Day. The twin that was born last month weighed 2 1/2 lbs and is doing well, the twin born last week was just over 4 lbs at birth. I have heard about twins being being born minutes apart where one is born just before midnight and the other arrives a few minutes later in the new day, but not a month apart.