Have multiple births happened in your family?

Yes (not biolgical family, but my (step)mom who really raised me). Mom has eight siblings and two are male, fraternal twins. Each of those twins had fraternal twins (boy boy and boy girl). Another sibling had boy girl twins.

My youngest brothers are twins, probably identical but the technology wasn’t as advanced back then as it is now. They were babies 6 and 7 in our family!
When I was 12 weeks pregnant with my first, my doctor suspected twins due to me measuring larger than expected, so he sent me for a scan. Just one, thankfully!

My youngest brothers are identical twins. All the sets of twins in our extended family are identical.

My dad's sister had twins, plus he had a set of twin cousins. My mom's cousins are twins, one of them has twins, the other has twin grandsons.

I am a non-identical twin and we are the first in both sides of our family since the late 1800s. But right after we were born, a set of identical twin cousins were born. So two sets of twins in two years for our family. And no more since then.

My grandma had fraternal (b/g) twins. Since my aunt and uncle though, no additional twins born in our family.

No twins in either side of our family. There might have been one set on my mom's side down the line, something in my memory is thinking that. I always kinda wanted twins.. but nope. My first two though were only 14 months apart.. weirdly people would ask if they were twins cause they look so much alike...

My mom did have an aunt who had lots of babies and they were always HUGE babies.. over 10 pounds plus.. I think the largest was 13 pounds.... not sure if diabetes related or not.. it was YEARS ago.. maybe 70 years.

My grandma on my dad’s side was one of 14 and there was at least 1 set of twins in there. Out of 18 cousins on that side one had identical boy twins. That’s it.

not in my direct line (so I voted singletons) but two of my mum's first cousins (who were sisters) had twins. One set were definitely fraternal (boy/girl) in 1950, I'm not sure on the other (both girls) - 1964

A second cousin once removed had 12 kids with 2 sets of twins - one set identical boys, the other boy/girl - in 1960 and 1962 (with a singleton in 1961)

There's also another 2nd once removed cousin who had twins (boy/girl) in 1909 followed by triplets(boy/girl/girl) in 1911 as well as 5 singletons.

All of these are related on my mother's father's side - descending from the same ancestral couple through different siblings

I have fraternal b/g twins. They will be 29 in June. There are no other sets of twins on either side of my family. Same for DH's family.

My sisters are fraternal twins. My father's mother was an identical twin and my mother had fraternal twin aunt/uncle (although the girl died shortly after birth). Mom also had a first cousin who had two sets of twins, but I don't recall if there were boy/girl or same sex.  Of the 7 grandchildren none had twins, though one cousin miscarried a set early in the pregnancy.  Of the 10 great grandchildren, there are no twins, but the two youngest have not had children yet.

DH's maternal grandmother was a twin, but I've never heard if they were identical or not. Both had passed away before he was born. One of his cousins has fraternal twin grandchildren.

I had fraternal twins.. after I had my first. 35 yrs ago.

my maternal grandfather had twin siblings who died at birth (born on the farm in the early 1880's)..

that's it. I was told I had a 25% chance of fraternal twins if I went to have more kids.. so that was it!!

My sister spontaneously had twin boys. No others that we know of in the family. My two DDs are 28 & 24 and neither have had any babies yet. They are both a little nervous about the possibility of twins!

All sorts of twins and higher-order multiples in my family and my husband's.

Science tells us the following:

1. Identical twins are basically a random occurrence.
2. The tendency in families to have twins only runs through the maternal side.

Science is wrong; it just doesn't know it yet. I had identical twins, as did my cousin Brenda. My mother's father was an identical twin and there are other identicals on my mom's side of the family.

My husband's grandmother miscarried twins, had triplet siblings who did not survive, his mother has identical twin brothers, his sister miscarried twins, and there are lots of other twins on that side of the family.

I have heard way too many stories about identicals running in families to believe that science has this one nailed down. Identicals are not particularly well-studied, for one thing. They make up one-third of twins, and twins are approximately 1 in 100 births. There's still a lot to learn about monozygotic twins (identicals). I also don't think they know enough about twins in general to say that the male does not contribute to a genetic tendency. I realize my experience is anecdotal, but I also firmly believe that we do not know wayyyyy more than we know, even with all of the technological advances in science and medicine. I base this on the "discovery" of the "interstitium" several years back, among other observations.