The results showed that each additional sibling up to about seven provided additional protection from divorce, Downey told Science Daily.
More siblings didn’t provide additional protection, but they did not hurt, either.
The researchers analyzed a variety of factors that could have affected the results, including education, socioeconomic status, family structure, race, age at marriage, among others.
“When we added in all of these controls, nothing took away the relationship we saw between siblings and later divorce,” said researcher Donna Bobbitt-Zeher.
Researchers said this new study highlights the positive effects of having siblings, but the results shouldn’t lead parents of only children to worry.
“There are so many factors that are related to divorce, and the number of siblings you have is just one of them,” Bobbitt-Zeher said.