Mother and daughter with cystic fibrosis.

With improved therapy and recognition of patients with mild disease, an increasing 
number of children with cystic fibrosis are reaching the reproductive years. 
Although virtually all males with cystic fibrosis are sterile, an unknown 
percentage of females with cystic fibrosis will be fertile. We know 
of only one case in which a mother with cystic fibrosis 
produced a child with the same disease. The purpose of this 
communication is to report the birth of a child with cystic 
fibrosis whose mother also has the disease. 