Other family members[edit]
Teen pregnancy and motherhood can influence younger siblings. One study found that the younger sisters of teen mothers were less likely to emphasize the importance of education and employment and more likely to accept human sexual behavior, parenting, and marriage at younger ages; younger brothers, too, were found to be more tolerant of non-marital and early births, in addition to being more susceptible to high-risk behaviors.[30] If the younger sisters of teenage parents babysit the children, they have an increased risk of getting pregnant themselves.[31] Once an older daughter has a child, parents often become more accepting as time goes by.[32] The probability of the younger sister having a teenage pregnancy went from one in five to two in five if the elder sister had a baby as a teenager.[33