A UK study finds that having two daughters makes for the most "harmonious" family life, reports the Telegraph.
The results show that of all the familial variations, two girls "... Are unlikely to fight, will play nicely and are generally a pleasure to be around."
The data reveals another surprising bit of sibling curiosity. "It also emerged two girls rarely annoy their parents, make limited noise, often confide in their parents and are unlikely to wind each other up or ignore each other."
Don't take this advice too far -- the study, which looked at families of twelve different combinations of children, found that if you think about doubling to four daughters, it will lead to a "world of pain."
What do you think of these findings? Do you have daughters? Between fighting over clothes, boys and putting each other down, do you find your girls make for a "harmonious" family life?
Read the full study at Telegraph.co.uk.