The method of having a boy in a single year and two months is inaccurate and is completely without scientific basis. The birth of a boy or a girl depends on whether the fertilized sperm is an X chromosome or a Y chromosome, and a woman’s egg only has an X chromosome, so the X sperm fertilized with the X egg is XX and develops into a girl, and the Y sperm fertilized with the X egg is XY and develops into a boy. Therefore, the birth of a boy or a girl has nothing to do with the statement of monoeciousness and bimonthlyness. To summarize, single year and two months can not decide whether to have a boy or not, so you should not pay too much attention to the sex of the fetus, both boys and girls are your own children, you should focus on the health of the fetus.