In the past, nuclear families where parents and their offspring living together under one roof used to be prevalent. However, there is now a huge trend towards single-parent families due to more marriages ending in divorce, while the increase in cohabiting couple families and step-families is probably a result of cohabitation and remarriage have become much more acceptable. In addition, the number of single-mother families has increased as many mothers want to have children without getting married. In terms of changing parental roles in a family, there has been a rise in the number of stay-at-home dads in recent years when it has become normal for women to gain qualifications and pursue their own career path. This is in sharp contrast to about half a decade ago when men were breadwinners and women were in charge of household chores in their families.