Twins: A Sneak Preview–and a Favor to Ask

If you’re interested in twins — and really, who isn’t? — check out the Logan Connections addendum when your book arrives in March. We’ve compiled the nearly 60 twins discovered so far in the extended Logan family. (We probably should have titled that section Gemini”!)

Some quick background genetics: Having identical twins is not genetic. Identical twins come from a single fertilized egg.

Fraternal twins, though, can run in families. But only the mother’s genetics matter. Fraternal twins happen when two eggs are simultaneously fertilized instead of one. As Dr. Anna Scholze of Stanford puts it, “A father’s genes can’t make a woman release two eggs.”

The farthest back we’ve found twins in the family thus far is 1836. (We’re hoping, with your help, to find earlier twins.) And in eye-opening news, one intrepid mother had three sets of twins. (By the time she was 41, she had 13 children, thanks to the triple twinning.)

A plea: If you know of twins in your branch of the family, please let us know so we can update our growing list. We’re missing many, we’re convinced, not only “way back,” but in recent years as well. Thanks so much. (We won’t list living twins without permission.)



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