Why Non-Identical Twins Run In Some Families, According To Genetics

Photo caption: They may not have come from the same egg, but they’re still two peas in a pod. Photo credit: Katrina Elena / Shutterstock.com. Article by Laura Simmons. IFLScience – March 14, 2024. Study: Human Reproduction.

Why do some families see more than their fair share of twin births? Identical twins are a random surprise, but scientists know that non-identical (or fraternal) twins have a genetic link. Finding the specific genes involved, however, has been another story. Now, new research has picked up on seven genes, and a test for them could not only help determine your chances of having twins, but also reveal clues about your fertility. […]

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