Woman Giving Birth To 2 Sets Of Twins Is Insanely Rare

The odds are one in 70 million!

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On Valentine's Day, Tressa Montalvo gave birth to four boys at 31 weeks — only they were paired off in separate placenta, making them not quadruplets, but two sets of identical twins.

Houston Chronicle, Brett Coomer / AP

According to the Houston Chronicle, Ace (3 pounds, 10 ounces) and Blaine (3 pounds, 15 ounces) were born at 8:51 a.m., while Cash (2 pounds, 15 ounces) and Dylan (3 pounds, 6 ounces) were born at 8:52 a.m. Their names spell out A-B-C-D.

According to the Woman's Hospital of Texas, the odds of two sets of twins occurring naturally — without in vitro, for example — are one in 70 million.

Jessica Testa is a national reporter for BuzzFeed News and is based in New York.

Contact Jessica Testa at jessica.testa@buzzfeed.com.

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