Such systems generally assume that the mother's husband is also the biological father. In some families, a woman may have children with more than one man or a man may have children with more than one woman. The system refers to a child who shares only one parent with another child as a "half-brother" or "half-sister". For children who do not share biological or adoptive parents in common, English-speakers use the term "stepbrother" or "stepsister" to refer to their new relationship with each other when one of their biological parents marries one of the other child's biological parents. Any person (other than the biological parent of a child) who marries the parent of that child becomes the "stepparent" of the child, either the "stepmother" or "stepfather". The same terms generally apply to children adopted into a family as to children born into the family. In the United States, one in five mothers have children by different fathers; among mothers with two or more children the figure is higher, with 28% having children with at least two different men. Such families are more common among Blacks and Hispanics, and among the lower socioeconomic class. 
1. Since crime rates in Canada are falling, is violence against women still a serious problem?
2. Isn't there less domestic violence now than in the past?
3. What is violence against women?
4. What causes violence against women?
5. Aren't men just as likely to be victims as women?
6. If a woman is being abused, why doesn't she just leave the relationship?
7. Who is most at risk of violence against women?
8. What effect does domestic violence have on children?
9. What should I do if I think someone is being abused?
10. Can violence against women ever be stopped?