Contrary to the current perception of many adolescents and young adults who view cohabitation as a substitute for marriage or as a stepping stone to a more secure marriage, studies show that cohabiting unions are more likely to dissolve than marriages and that marriages preceded by cohabitation are more likely to dissolve than marriages that were not preceded by cohabitation. Cohabiting unions are more likely to involve infidelity and also more likely to involve violence. Furthermore, children, whether born prior to, during, or after parental cohabitation, are at increased risk for negative sequelae including premature birth, school failure, lower education, more poverty during childhood and lower incomes as adults, more incarceration and behavior problems, single parenthood, medical neglect and chronic health problems both medical and psychiatric, more substance, alcohol and tobacco abuse, and child abuse. Cohabiting women are also more likely to choose to end their child’s life prior to birth.