A child against all odds. Part 1, Choosing children.

First in a six-part series looking at the cutting edge of fertility treatment and facing up to the emotional and ethical problems involved. Presented by Robert Winston, this part looks at the issues behind attempting to 'choose' children. We meet two couples, one who are desperate to avoid their third child being born with the genetically inherited condition, Gaucher Disease, the other who after producing four boys are desperate to conceive a girl.