Ovulation is a very important period, especially for couples trying to conceive. During this period, a woman's eggs are released from her ovaries and can wait in the fallopian tubes for fertilization. If a woman is successfully fertilized during this period, she can expect to become pregnant.

To determine when ovulation occurs on the 5th, you need to first understand a woman’s menstrual cycle. Generally, a woman's menstrual cycle lasts 28 days, but some women have longer or shorter menstrual cycles, depending on genetic and personal factors.

According to the algorithm of a woman's menstrual cycle, the ovulation period is 14 days from the first day of the next menstrual period. Therefore, if a woman's menstrual cycle is 28 days, the first day of the next menstrual period will be March 5, and the last 14 days will be February 19. This day is the woman's ovulation period.

However, a woman's menstrual cycle is affected by many factors, such as diet, exercise, medications, stress, and hormone levels, so the most accurate prediction method is to make predictions based on a woman's menstrual cycle and personal factors.