Male or female is determined by chromosomes, which are determined by the genetic material in the nucleus of the cell. In female reproductive cells, the number of chromosomes is XX, so females have two X chromosomes, while males have one X chromosome and one Y chromosome.

However, whether a boy or a girl is born is not determined by this period. Whether a child is a boy or a girl is determined by the genes of the parents, and the genes of the parents are passed on to offspring through the chromosomes in reproductive cells. So, regardless of whether a woman's menstrual cycle is 28 or 30 days, or when her ovulation occurs, they have a chance of having a boy or a girl.

If you want to improve your chances of having a boy, then women should have as many orgasms as possible. This is because orgasm can increase the acidity in a woman's vagina, which is conducive to the combination of sperm and eggs. In addition, women should also release as many eggs as possible during the menstrual cycle, so that men have more chances to inherit the X chromosome, thus increasing the chance of giving birth to a boy.

Male or female is determined by chromosomes, which are determined by the genetic material in the nucleus of the cell. In female reproductive cells, the number of chromosomes is XX, so females have two X chromosomes, while males have one X chromosome and one Y chromosome. In a woman's menstrual cycle, the ovulation period occurs 14 to 16 days after the start of menstruation.