Sarah and her mono mono identitcal twin

Mother gave birth to mono mono identical twins described as ‘one in 10,000 births.’

​​”The ultrasound tech said ‘Oh, there’s two’ and my husband said, ‘Two what?’ The couple was told they were having mono mono twins, meaning the babies shared the same amniotic sac and placenta,” US WEWS reports.

Sarah and Bill Thistlethwaite’s baby girls came into the world not just happy and healthy, but according to WEWS, also holding hands.

The survival rate for monoamniotic, or mono mono, twins is anywhere from 81 to 95 percent with aggressive fetal monitoring, but that number can drop to 50 percent without such monitoring.

A Wikipedia article explains that because the babies share the same amniotic sac, there’s a risk of the babies becoming entangled in each others’ cords, one twin compressing the other’s cord, or one twin receiving more nourishment than the other.

And there aren’t many treatments. A drug called Sulindac has been used experimentally to lower the amount of amniotic fluid inside the sac which makes it harder for the twins to move around, potentially preventing entanglement and compression.

​Close monitoring and inpatient care are also suggested. WEWS reports Sarah was in the hospital for 56 days before she gave birth via C-section, which is how all mono mono twins are delivered for fear of entanglement or compression.

The Thistlethwaite’s twin girls will soon join their older brother at home.