Ovulation and having a girl: Scientific explanation

Researchers believe that this may be related to the sex chromosomes in women. In humans, both men and women have X and Y sex chromosomes, but female eggs can only receive X chromosomes, while male eggs can receive either X or Y chromosomes. Therefore, if a woman's egg can only receive an X chromosome when it is released, she will have a higher chance of giving birth to a boy. Conversely, if a woman's eggs can receive both X and Y chromosomes when they are released, she has a higher chance of giving birth to a girl.

So, how to determine a woman’s ovulation period? Generally speaking, a woman's menstrual cycle is divided into four stages, namely the safe period before menstruation, the middle and late periods of the menstrual cycle, and the safe period after menstruation. During the safe period before menstruation, women are least likely to release eggs, so the probability of giving birth to a boy is relatively high. In the middle and late stages of the menstrual cycle, women are more likely to release eggs, so the probability of giving birth to a girl is relatively high. During the safe period after menstruation, women are least likely to release eggs, so the probability of giving birth to a boy is relatively low.

So why do some women release boy eggs during ovulation? This may be related to female sex chromosomes. If a woman has an X sex chromosome, she can only produce girl eggs. On the contrary, if a woman's sex chromosome is Y, then she can release either a boy egg or a girl egg. Therefore, if a woman's egg can only receive an X chromosome when it is released, she will have a higher chance of giving birth to a boy.