December 20th is a very important day of the year because it is the beginning of ovulation. During this day, a woman's eggs are released from her ovaries and await fertilization. This is a very important period for anyone trying to conceive.

To improve the chance of pregnancy, women should maintain good eating habits, increase exercise, and maintain physical and mental health. Women should also have sex during ovulation to help improve their chances of getting pregnant.

Of course, pregnancy is not a simple matter and requires women's joint efforts and patience. If women are trying to get pregnant, it's recommended that they talk to their doctor about how to take better care of themselves and improve their chances of getting pregnant.

In short, December 20th is a very important day of the year because it is the beginning of ovulation. This is a very important period for anyone trying to conceive.