Fathers fashion their daughters as expertly and as powerfully as they do their sons. The researchers also looked at whether fathers might influence the frequency of teen sex, or a teen's number of sex partners, but found no strong influence of paternal relationships or attitudes, they said. The researchers defined "fathers" broadly — they included biological fathers, stepfathers and adoptive fathers, and other men such as uncles or grandfathers who participated as primary male caregivers in teens' lives. Guilamo-Ramos noted that few of the reviewed studies examined these behaviors, and said more research is needed. Then he forced her into sex slavery, prosecutors say But the children were only taken from their parents last week, when a concerned citizen spotted the mother with the children on April 24, investigators said. When she did make it to school at Lew Wallace Elementary, the girl was often exhausted, her teacher said. Police are investigating the mother , but she has not been charged, KRQE reports. The father — James Stewart, 37 — was arrested Wednesday on felony charges of human trafficking, criminal sexual contact of a minor, promoting prostitution and contributing to the delinquency of a minor, according to jail records. A better understanding of the role dads play in their teens' sexual behaviors and reproductive health could help researchers identify which parenting practices have the biggest impact on teens, and lead to better invention strategies that include both moms and dads, the researchers said. In addition, teens who were close with their fathers tended to start having sex later, the studies showed. Much effort has gone into parsing the aspects of mother-teen relationships that prevent teens from engaging in sexually risky behaviors, the researchers said. Moms and dads "Evidence increasingly suggests that mothers and fathers independently shape areas of child development, such as academic success and peer relationships," the researchers wrote in their study, published Monday Oct.