Three pregnant women sitting in the doctor's waiting room awaiting a check-up, all are knitting.

The first woman goes into her handbag and takes a tablet. The other two women are extremely interested and ask what she has just taken. Brewers yeast and vitamin C tablet she says. Why take them ? ask the other two. Good for me, good for the baby, comes the reply.

A few moments later the second woman goes into her handbag and takes a tablet. Again, the other two women are extremely interested and ask what she has just taken. A Cod Liver Oil and multi-vitamin tablet she says. Why take them ? ask the other two. Good for me, good for the baby, comes the reply.

A few moments later the third woman goes into her handbag and takes a tablet. Again, the other two women are extremely interested and ask what she has just taken. A thalidomide tablet she says. Why take them ? ask the other two. I can't knit sleeves, comes the reply.