During the first and second trimesters of her mother's pregnancy the neurons began to reach tentacles out to each other, establishing synapses-points of contact-at a rate of two million a second.

Mr Beatie sparked an international furore in March after he announced he was pregnant.

After 6 months of pregnancy, at the end of the second trimester, everything has developed and is functioning as it will in the fully-grown baby. It's all there, just very small and immature.