wrongful birth

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A birth of a child that provides the basis for a cause of action for civil damages because the birth would not have occurred if medical sterilization procedures had been properly performed, if adequate birth control had been provided, or if the parents had been given appropriate prenatal testing or genetic counseling.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A lawsuit filing, claiming a doctor failed to advise the parents a child might have the prospect of birth defects.