Seven programmes on the beginnings of a human life and the early acquisition of immunity to disease.
The fusion of the microscopic egg and sperm cells is the beginning of a new individual.
In the programme are: Professor P. Krohn, Dr. A. S. Parkes, F.R.S., Lord Rothschild, G.M., F.R.S.
(First shown in the 'Life Before Birth' series in June, 1960)