The unborn child’s gender is always a trivial subject among expecting parents and even relatives alike.  Sometimes this may spark up an argument. It’s because parents always have gender preferences. Due to this fact, modern technology answered this common predicament like the ultrasound machine. However, modern people are not the only one who is itching to know what cribs to buy and name their babies with according to their gender, ancient people also tried to discern what sex that bundle of joy would be. Seven centuries ago, a Chinese scientist drew a chart which was discovered in a royal tomb. This chart is what came to be known as the Chinese Pregnancy Calendar.

How to use the Chinese Pregnancy Calendar: 

The Chinese Pregnancy Calendar is a gender prediction chart that uses the Chinese lunar calendar for its prediction. As a lunar calendar, the start of the lunar year is based on the cycles of the moon. The calendar has boxes colored with blue and pink or boxes that have letter B and G on it. But the results are the same. In using the calendar for prediction, first you have to identify the woman’s conceiving age. The calendar has the range of 18 to 45 of the woman’s conceiving age.

Secondly, identify the month of conception of the mother. Lastly, like a mathematical graph of an X and Y axis, converge the line between the woman’s month of conception as an X-axis and the woman’s conceiving age as a Y-axis. If the point of convergence ends up in a blue box that means to say that your baby is a boy. Consequently, if the point of convergence ends up in a pink box that means to say that your baby is a girl.


This ancient method is being used for centuries already. Many couples attested to its accuracy and were satisfied with the results. When you say you might want to use this, just hold on a second. This is not a 100% accurate test; moreover, this can be equated to a toss coin probability. Even a modern method like Trans abdominal ultrasound commonly used for pregnancy ultrasonography that uses high frequency sound waves to transmit images to the screen formed from echoes from the body structure, is not 100% reliable. Even this method requires at least 4 months of fetal age for the fetus to develop his or her gender to be identifiable.

The single most effective way to predict a baby’s gender is through genetics. In a human’s gametes, the ovary and sperm, has a pair of 23 chromosomes, 22 pairs of autosomes and a pair of sex chromosomes. Each of these sex cells contributes 23 pairs of chromosomes for a total of 46 chromosomes. If both pairs of the gametes have sex chromosomes of X, then your baby will be a girl. If however one gamete has a Y chromosome then your baby will be boy.

Therefore if the sex chromosomes are X and Y then it’s a male, if it the baby’s sex chromosomes are X and X, it’s a girl. This is the absolute fact; however, there is no test in checking chromosomes just to know the gender of your baby because the merging of gametes happens only at the very beginning, fertilization. Here’s another fact, the Chinese Pregnancy Calendar is used mainly for entertainment nowadays and whether both parents use the modern or ancient ways of determining gender, it doesn’t really matter. Health care professionals and counselors highly recommend buying things, designing the room and planning for a name after the baby is born. That way, you will surely know whether it’s a boy or a girl.