A pair of Monoamniotic twins have been born while holding hands in Ohio.

In monoamniotic or “mono mono” twins, which happen around one in ever 10,000 births, the two identical twins share the same amniotic sac in their mother’s uterus as well as the same placenta and umbilical cord.

The sharing of the umbilical cord can lead to strangulation of the twins in the womb, and so mothers expecting mono mono twins are closely monitored from their first visit to the doctor.

Sarah Thistewaite and her husband Bill found out the news that they were expecting rare mono mono twins in their 19th week of pregnancy, and the doctors guided them through the pregnancy without issue up until the final few weeks where Sarah was warned that she would have to spend the time in hospital in preparation for the birth.

Finally, after 57 days in hospital, the twins, named Jenna and Jillian, were delivered by Caesarean section, with doctors removing the pair safely from the womb holding hands, according to Newsnet5.

The mother and children are reported to be doing well.