Have you all heard about this? An Australian couple left one of their twins with the Thai surrogate mother. The twin they took home was healthy and the twin they left behind has down syndrome. The surrogate was only told about the child's issue when she was 7 months pregnant. The surrogate was not paid her entire fee.

http://m.thestar.com/#/article/news/world/2014/08/04/baby_with_down_syndrome_left_with_surrogate_could_get_australian_citizenship.html

http://www.foxnews.com/world/2014/08/03/thai-surrogate-mother-says-not-angry-with-australian-couple-who-left-unhealthy/