WATCH: Baby born inside intact amniotic sac

Video of a baby being born inside a fully intact amniotic sac has gone viral on Facebook.

According to the Daily Mail, the video was taken in Spain over the weekend, and captured the unlikely scene as the baby emerged still while still inside the amniotic sac, minutes after its twin was delivered without issue.

The site says the occurrence is estimated to occur once in every 80,000 births.

Footage of the incredible moment shows the baby lying on the table inside the amniotic sac, still in the fetal position.

Later in the video the baby can be seen moving around

You can watch the video below.