The secret of a happy family is having two daughters, according to a study.
Researchers concluded that two girls are unlikely to fight, will play nicely together, rarely annoy their parents and tend not to wind each other up.
They also make little noise, seldom ignore each other and are more likely to confide in their mother or father, scientists claim.
However, doubling the number of daughters is a recipe for disaster, with parents of four girls the least happy with their domestic set-up. Parents of four girls reported refereeing an average of four fights a day.
After two girls, the second most appealing combination of children was one girl and one boy, with 86% of parents saying their little boy and little girl were genuine friends.
Two siblings of opposite genders rarely argue over toys and are easy to reason with, but suffer from a lack of shared interests as they grow up, the researchers claim.
'BEST' TO 'WORST' COMBINATIONS OF CHILDREN:
1. Two girls
2. One boy and one girl
3. Two boys
4. Three girls
5. Three boys
6. Four boys
7. Two girls and one boy
8. Two boys and one girl
9. Three boys and one girl
10. Three girls and one boy
11. Two boys and two girls
12. Four girls
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