the prognosis depends on the location and severity of the constricting bands. every case is different and multiple bands may be entangled around the fetus. bands which wrap around fingers and toes can result in syndactyly or amputations of the digits. in other instances, bands can wrap around limbs causing restriction of movement resulting in clubbed feet. in more severe cases, the bands can constrict the limb causing decreased blood supply and amputation. amniotic bands can also sometimes attach to the face or neck causing deformities such as cleft lip and palate. if the bands become wrapped around the head or umbilical cord it can be life-threatening for the fetus. the number of cases of miscarriage that can be attributed to abs is unknown, although it has been reported that it may be the cause of 178 in 10,000 miscarriages. up to 50% of cases have other congenital anomalies including cleft lip, cleft palate, and clubfoot deformity. hand and finger anomalies occur in up to 80%. epidemiology the reported incidence of constriction ring syndrome varies from 1/1200 and 1/15000 live births. the prevalence is equal in male and female. fetomaternal factors like prematurity, maternal illness, low birth weight, and maternal drug exposure are predisposing factors for the constriction ring syndrome. no positive relationship between crs and genetic inheritance has been reported. society notable people living with abs include: sophie wells, british member paralympics dressage team gina casillas, us volleyball player ian t. jamison, us artist anna johannes, us paralympic swimmer jean-jacques machado, 7th degree red-and-black belt in brazilian jiu-jitsu monica price, a case study of a young woman born with amniotic band syndrome kingsley mcgowan, u.s. men's rugby player troy fumagalli, university of wisconsin football player (2017 cotton bowl offensive mvp) lyric mariah heard u.s. model shaquem griffin, miami dolphins football player (2016 aac defensive player of the year) jennifer bricker, acrobat and aerialist sarah herron, the bachelor season 17 contestant, bachelor in paradise seasons 1 and 3 contestant, founder of "she lift" for girls with disabilities. victoria canal, cuban-american singer and songwriter