Studies have indicated that adolescent girls are often in abusive relationships at the time of their conceiving.
They have also reported that knowledge of their pregnancy has often intensified violent and controlling behaviours on part of their boyfriends. Women under age 18 are twice as likely to be beaten by their child's father than women over age 18.
A UK study found that 70% of women who gave birth in their teens had experienced adolescent domestic violence.
Similar results have been found in studies in the United States. A Washington study found 70% of teenage mothers had been beaten by their boyfriends, 51% had experienced attempts of birth control sabotage within the last year, and 21% experienced school or work sabotage.
In a study of 379 pregnant or parenting teens and 95 teenage girls without children, 62% of the girls aged 11-15 years and 56% of girls aged 16-19 years reported experiencing domestic violence at the hands of their partners. Moreover, 51% of the girls reported experiencing at least one instance where their boyfriend attempted to sabotage their efforts to use birth control.
Source: wikipedia
The shootings came during a particularly violent three days across the U.S., with shootings that left 14 dead in Binghamton, N.Y., and six dead in Washington state, where a father shot five of his children, ages 7 to 16, using a rifle, and later, himself. 
