Generally speaking, ovulation on day 40 of the menstrual cycle is calculated from the first day of the next menstrual period, and the 14 days before that is the day of ovulation. Due to individual differences, it is necessary to combine the results of ovulation test or ultrasound to make a detailed judgment.
Ovulation refers to the release of egg cells and is related to one’s menstrual cycle. If your menstrual cycle lasts 40 days, ovulation usually occurs about 14 days before your next period, and the five days before and the four days after the day of ovulation combined are the period of ovulation. After ovulation, the blood in the ovaries turns into the corpus luteum, which secretes estrogen and progesterone.
However, this is not absolute. Different women have different lifestyle habits and physiological cycles, so the exact time of ovulation is not fixed. If you want to further determine the ovulation period, you can observe the development of follicles through ovulation test or ultrasound examination to calculate the date of ovulation.
Since hormone levels in most women change during ovulation, if you are planning to get pregnant, you can have sex during this time to increase your conception rate. On the contrary, care should be taken to use safe and effective contraception to avoid unwanted pregnancy. For details, it is recommended to consult a medical professional.