What are the odds? A Houston, Texas woman has given birth to two sets of identical twin boys beating the one in 70 million odds of that occurring.

The Houston Chronicle reports Tressa Montalvo delivered her sons on Thursday, Valentine’s Day, at The Woman's Hospital of Texas.

The 36-year-old Montalvo delivered sons Ace and Blaine at 8:51 a.m. Ace weighed 3 pounds, 10 ounces, and Blaine weighed in at 3 pounds, 15 ounces. Sons Cash and Dylan arrived a minute later — Cash at 2 pounds, 15 ounces, and Dylan at 3 pounds, 6 ounces.

Montalvo says she and her 43-year-old husband, Manuel, planned the pregnancy but didn't use fertility drugs. In her words, "I guess we just succeeded a little too much."