A single mother from South Oxhey will be taking her campaign to ban the use of a drug, which has linked to birth defects, to the Houses of Parliament next month.
Deborah Mann, of Morriston Close, has two children, both with fetal valproate syndrome.
Branwen, 18, was born with various congenital abnormalities, chronic migraines, and regular lapses of concentration and Rhonwen, 20, was born with two holes in the heart and has learning difficulties.
The 50-year-old is the secretary of the Organisation for Anti-Convulsant Syndrome (OACS), which is a support group for sufferers and families of those born with Fetal Anti-Convulsant Syndrome (FACS).
She is campaigning for the drug, sodium valporate, not to be given to women because of the possible effects the drug can have on pregnancy.
FACS is caused when a woman who takes the anti-convulsant medication, to manage epilepsy, for example, becomes pregnant.
Ms Mann said the effects on the child can vary from developmental delay, learning delay, dysmorphic facial features, physical disabilities, speech and language delay.
OACS is campaigning for the drug, sodium valporate, to be banned from being given to women because of the possible effects on pregnancy.
The meeting at the Houses of Parliament on Wednesday, June 18 will focus on the use of the drug.