It indicates that the dreamer is about to get pregnant and give birth to a boy; It may also indicate that the dreamer's recent fortune is good, his life is happy, and his work or career may have new development and progress in the near future. In the past, some families were very eager to have boys to carry on the family line, but now they advocate gender equality. Many people think it makes no difference to have boys and girls.
There are two possibilities for pregnant women with children to dream of having a boy. One is that they will really get pregnant and give birth to a boy. The other is that their families are unhappy at present, and they envy and expect others' happiness. Note: the above content is feudal superstition, don't believe it.