the drug was produced by german company schering, which was subsequently taken over by bayer. legal action against the firm was halted in 1982 because of a lack of evidence. now, a group of families finally have managed to take their fight all the way to the british parliament. reporter: this mother and daughter hardly leave each other's side. their walk by the sea in liverpool is a daily ritual. pam mawdsley has devoted her life to looking after her daughter louise. louise was born with deformities 42 years ago. her development has been very restricted. louise has needed 24-hour care ever since her birth. it's a full-time job for pam. she recalls the difficult days after the birth. >> all her bones stopped growing and stopped her brain from growing so she's got a very small head. her brain stopped growing so it couldn't develop anymore and when she had an operation on her brain when she was about 10 months, nine months old, they found there were great cavities with nothing in. reporter: pam is certain that the cause lies in a pregnancy test that she took. >> i went to my doct