A recent study has found that the sex of a fetus can influence the amount of milk a mother produces. The study, which was published in the journal Pediatrics, found that mothers who were pregnant with boys produced more milk than mothers who were pregnant with girls.

The researchers believe that this difference may be due to the fact that boys have higher levels of certain hormones, such as testosterone, which can stimulate milk production. The researchers also found that mothers who were pregnant with boys had higher levels of prolactin, a hormone that is responsible for milk production.

The study included over 1,000 mothers who were followed from the beginning of their pregnancy until their babies were 6 months old. The researchers found that mothers who were pregnant with boys produced an average of 25 ounces of milk per day, while mothers who were pregnant with girls produced an average of 20 ounces of milk per day.

The difference in milk production between mothers who were pregnant with boys and girls was statistically significant, meaning that it was not likely to be due to chance. The researchers also found that the difference in milk production was not explained by other factors, such as the mother's age, race, or ethnicity.

The study's findings suggest that the sex of a fetus can have a real impact on the amount of milk a mother produces. This information could be helpful to mothers who are planning to breastfeed their babies. If you are pregnant with a boy, you may want to expect to produce more milk than you would if you were pregnant with a girl.