After bearing one baby in each uterus, an Alabama woman with two uteri and two cervixes gave birth to two children.

After a total of 20 hours of labor, Kelsey Hatcher of Dora, which is located roughly 28 miles (45.06 kilometers) northwest of Birmingham, gave birth to two girls on Wednesday and Thursday.

At the age of seventeen, Hatcher received a diagnosis of uterine didelphys, or a double uterus. In women, the uncommon congenital disease affects 0.3% of cases, according to a University of Alabama at Birmingham study. According to the article, there is a “estimated one-in-a-million chance” of having a dicavitary pregnancy, or carrying a baby in both uteri.

“Never in our wildest dreams could we have planned a pregnancy and birth like this; but bringing our two healthy baby girls into this world safely was always the goal, and UAB helped us accomplish that,” Mrs Hatcher said in a statement released by the hospital.

“It seems appropriate that they had two birthdays, though. They both had their own ‘houses,’ and now both have their own unique birth stories.”