MEMPHIS, Tenn. (AP) — Conjoined twins from Nigeria have been separated after a lengthy operation at a Tennessee hospital.

Le Bonheur Children’s Hospital spokeswoman Anne Glanker tells The Associated Press that Miracle and Testimony Ayeni were separated during an 18-hour procedure at the Memphis facility on Nov. 7 and 8.

The girls were conjoined at the lower half of the body.

The family has another reason to celebrate — Wednesday is the girls’ first birthday.