The scanning aims to shed light on the complex development of the foetus, enabling doctors and parents to view the movements of the unborn baby in detail.
"The conventional ultrasound scans are excellent for measuring the foetus and assessing growth but convey very little information about the behaviour and emotions of the baby," said Professor Campbell, the former head of obstetrics at King's College Hospital.
"The advanced scanning techniques have opened a window on a hidden world."
The images released yesterday, which are to be published in a book entitled Watch Me Grow, reveal how unborn babies can move their limbs by stretching and kicking as early as 12 weeks after conception.
At 18 weeks, foetuses were able to open their eyes, while from 26 weeks they displayed an array of moods and actions, including scratching, smiling, sucking and crying.
"Most doctors thought eyelids were fused until 26 weeks and smiling was thought to start six weeks after the birth," said Prof Campbell.
The images may reignite the debate surrounding the deadlines for abortion, which are currently permitted in Britain until the 24th week of pregnancy.
Nuala Scarisbrick, a trustee of the anti-abortion group LIFE, said: "These are remarkable pictures and show babies in the womb developing much earlier than people realised.
"From our point of view it helps educate people about how a child in the womb is a fully developed person."
The new scanning technique costs £275 ($785) for a one-hour session.
Ultrasound pictures and videos
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Herald Feature: Health
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