The war has been over for decades. What does it mean to say that there are more women than men in Vietnam now?

Excluding the factors of war, that is to say, the imbalance between men and women in Vietnam, without the factors of war, may also lead to imbalance between men and women. That is to say, if there are more girls and fewer boys in the long-term newborn children, then there will be more women and fewer men, and there will be fewer offspring, which will naturally reduce the number of children, but it is still said that the majority of girls are the main reason for the birth rate of children.