@simrin-- I know that this is a very personal and sensitive issue and not everyone would feel okay doing this. However, there is a method called pre-implementation. This is where doctors will take eggs from the female and sperm from the male and fertilize them in the lab. Afterward, they can do genetic testing and find the fertilized eggs which are healthy (no Larsen syndrome) and implant that into the female.
I think it costs some money, but it's the best and safest way to have a baby when genetic disorders are of concern. Of course, the other completely safe thing to do is adoption. But it is possible to have a healthy, happy baby even if someone is suffering from Larsen's syndrome.