Are the chances of getting a boy or girl equal?

Question

When a woman is pregnant, is the chance of having a girl or boy equal 50/50? Or are there like some biology stuff determining the odds?

In: Biology

Answer 1

I recently read that external factors can skew the odds slightly. If a woman is experiencing famine, for example, then she’s slightly more likely to have a girl than a boy.
It’s unclear if that’s due to fewer y-chromosome-carrying sperm fertilizing eggs when nutritional conditions are bad or whether male embryos are more prone to miscarriage due to nutritional deficits.