Two thirds of today's teenagers still live with both of their parents.
More and more often, though, their parents live apart. This is twice as likely if the parents had a common-law relationship rather than a marriage.
Six out of 10 Finnish children are now born to married couples. Another finding is children's grandparents are also now more likely to be divorced.
The report also warns that there is a growing gap between lower and higher-income families with children. Generally family incomes increase as children get older.