According to a longitudal study, the odds are high that families with 3 children will have a fourth; and the odds of having a girl DECREASES after each boy child is born.
In-Gender published the results of a longitudual study based on Department of Labor data about the odds of having a boy and girl that also revealed some insights into parents decisions to keep “trying” for a child of the other gender.
You can find the results HERE, but in sum it said:
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Parents are slightly more likely to stop having children if the first child is a girl.
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Parents are 6% more likely to stop having children if the first two children are a boy and a girl.
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Of parents with two same-gender children, parents of two girls are 3% more likely to stop having children than parents of two boys.
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Parents of 3 same-gender children are only 2% more likely to have a 4th child than parents with mixed-gender children.
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Parents of 2 boy, 1 girl families are the most likely to have a 4th child.(uh oh. That’s me!)
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The odds of having a girl seem decrease after having each boy, but only very slightly. Even after 3 boys, you are only 6.4% more likely to have a 4th boy than a girl.
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The odds of having a boy seem to increase after having girls, except after 2 girls, when a 3rd girl is more likely.
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Regardless of previous children, the odds are in favor of having a boy at some point
- The odds that there will be all one-gender kids in a family are also high
Hope this helps! Good Luck!