Fetal entities: First twin 17–30%; Second twin 28–39%; Stillborn 26%; Prader–Willi syndrome 50%, Werdnig–Hoffman syndrome 10%; Smith–Lemli–Opitz syndrome 40%; Fetal alcohol syndrome 40%; Potter anomaly 36%; Zellweger syndrome 27%; Myotonic dystrophy 21%, 13 trisomy syndrome 12%; 18 trisomy syndrome 43%; 21 trisomy syndrome 5%; de Lange syndrome 10%; Anencephalus 6–18%, Spina bifida 20–30%; Congenital hydrocephalus 24–37%; Osteogenesis imperfecta 33.3%; Amyoplasia 33.3%; Achondrogenesis 33.3%; Amelia 50%; Craniosynostosis 8%; Sacral agenesis 30.4%; Arthrogriposis multiplex congenita 33.3; Congenital dislocation of the hip 33.3%; Hereditary sensory neuropathy type III 25%; Centronuclear myopathy 16.7%; Multiple pituitary hormone deficiency 50%; Isolated pituitary hormone deficiency 20%; Ectopic posterior pituitary gland 33.3%; Congenital bilateral perisilvian syndrome 33.3; Symmetric fetal growth restriction 40%; Asymmetric fetal growth restriction 40%; Nonimmune hydrops fetalis 15%; Atresia ani 18.2%; Microcephalus 15.4%; Omphalocele 12.5%; Prematurity 40%