A baby has been pictured giving a thumbs up from inside its mother's womb.
The ultrasound image was posted online by the baby's uncle and has since been shared countless times online.
Twitter users have nicknamed the unborn child 'Fonzie' after the Happy Days character.
The baby's father Brandon Hopkins responded to the comments online, by tweeting: "Yes i am the father of fetus Fonzie".
Hopkins, 31, of Meadville, Pennsylvania, has said he and his partner are actually expecting twins in January. They do not yet know the sex of the babies.