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Evidence that unborn babies smile
An ultrasound scanner which shows enhanced pictures from inside the womb appears to reveal that unborn babies smile.
It has long been thought that babies do not smile until weeks after their birth, and then only after they learn the expression from their mothers.
But London obstetrician Professor Stuart Campbell has used the new scanning technology to capture images of foetuses smiling, crying, yawning and blinking.
Professor Campbell said: "It is remarkable that a newborn baby does not smile for about six weeks after birth. Before birth most babies smile frequently.
"This may indicate a baby's calm, trouble-free existence in the womb, and the relatively traumatic first few weeks after the birth, when the baby is reacting to a strange new environment."