An Alabama woman with a rare congenital anomaly that results in her having two uteri gave birth to healthy twin girls earlier this week.Kelsey Hatcher and husband Caleb welcomed Roxi Layla on December 19 night and her sister Rebel Laken on December 20 morning at the University of Alabama at Birmingham Hospital (UAB), the mother-of-five announced on social media.”Our miracle babies were born! They decided they were rare enough statistically that they should just go ahead and have their own birthdays too,” Hatcher wrote on Instagram.Hatcher has a rare double uterus and was pregnant with a baby on each side, a rare pregnancy known as a cavitary pregnancy that has a one-in-a-million chance of occurring.Hatcher’s pregnancy was considered high risk and she was induced at 39 weeks. After a combined 20 hours of labour, the two baby girls were born.The first baby was delivered vaginally, as were Hatcher’s previous three children, while the second one was born via C-section.