Is the age of boys and girls according to the lunar calendar or the solar calendar?

According to the bitmap of boys and girls' palace, the pregnancy age is imaginary and the pregnancy date is lunar calendar.

According to the lunar calendar, the nominal age at birth is 1 year, and it increases by 1 year every Spring Festival.

Experts believe that there is no scientific basis for predicting the birth of boys and girls. Just have fun at ordinary times. Don't take it too seriously. Don't think too much. Believing in a certain method may be counterproductive, and eating a certain food may lead to malnutrition. Couples should have a scientific pre-pregnancy examination before giving birth to avoid infertility and genetic diseases. Check regularly during pregnancy to avoid affecting the healthy growth of the fetus.