A Houston mother is celebrating the birth of sextuplets, something The Women's Hospital in Texas says has only a one in 4.7 billion chance of occurring.

Thelma Chiaka welcomed two sets of twin boys and one set of twin girls into the world on Friday. Per Yahoo Lifestyle, the six babies made their grand entrance between 4:50 and 4:59 a.m.

The hospital notes the babies all weighed between 1 pound, 12 ounces and 2 pounds, 14 ounces. Thankfully, they are in stable condition and being monitored in the hospital's neonatal intensive care unit (NICU). The hospital also confirmed Chiaka named her twin girls Zina and Zuriel.

Founded in 1976, The Women's Hospital of Texas helps deliver over 10,000 babies a year, which it claims is more than any other maternal unit in the Houston area.

Congratulations, Thelma!

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The Women's Hospital of Texas

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