We have three sets of identical twins going right now. My brothers are identical, one of them has identical girls and a cousin has identical girls. My mom was on pregnancy number 3, with 11 months between each baby. The doctor heard a faint heartbeat and told her, "Oh, you are finally getting your girl." She went to the hospital for an emergency c-section. My father was told both mother and baby were in danger, and out came 2 healthy boys instead of the one sickly girl they expected, both about 6 pounds. Mind you, my mom is not quite 5 feet tall.
The rumor is my gg grandmother had twins. We always thought she died in childbirth with the babies, but after getting her death cert, it appears she died a couple days after birth from an infection. We don't know what happened to the babies (no records at their church at all), but my mother and a great-aunt always said they had heard they were fraternal. I think the only way non-medical people would know that back then would have been a boy and a girl. Oh, where are those babies.
I just started working on my Murphy branch and there are a lot with the same birth year. I haven't determined yet if they were twins or "Irish twins." I'll keep all posted when I hear anything.
Kathleen