|Early in the pregnancy, she underwent genetic testing of the fetus and had an ultrasound at about 20 weeks that, their suit alleges, doctors told her showed the child was female and bearing the same inactive form of the genetic defect Mrs. Schirmer carried.
They were told that the fetus carried the inactive form of the defect. Bad lab work.
It's not likely that the fetus's sex was determined by genetic testing; that was probably done during the ultrasound (in which you can see physical details, such as genitalia). Bad ultrasound reading.
The docs screwed up, and there is a child in the world who has virtually no quality of life, likely stressing his parents' economic ability to provide him with what little quality of life he can have and no doubt subjecting them to the emotional stress of having a very ill child (one of the most stressful things in the world).
Yeah, I'd sue someone, too.
(But then again, if you have a genetic defect that could subject your child to such a life, you should either a. not reproduce, or b. adopt. JMHO)