Basal body temperature measurement (a) Basal body temperature is the easiest and most practical way to help us understand the function of our ovaries. If you can provide your basal body temperature to your doctor during your visit to the doctor, you can give him/her a more comprehensive understanding of your condition so that he/she can help you with more targeted treatment to achieve the best results. The basal body temperature is very simple to measure. First, prepare an ordinary mercury thermometer and clean it. Then every day, before going to bed, dump the thermometer and place it next to your pillow. As soon as you wake up in the morning, do not move or talk, gently reach out and pick up the thermometer, place it under your tongue and hold it for 5 minutes. When you get up, write down your temperature on a special basal body temperature record sheet. When there is irregularity in menstruation, or irregular color of menstrual flow, or if you want to get pregnant in the near future, you can take your basal body temperature for one week before your first visit to the hospital. This way the visit allows the doctor to target the patient and the treatment will be more effective. The length of the menstrual cycle varies from person to person and should be within 28±7 days, which is called the follicular phase before ovulation and the luteal phase after ovulation. The length of the follicular phase varies, but the normal post-ovulatory luteal phase is about 14±2 days. On the day after ovulation, the ovaries form the corpus luteum, which secretes progesterone and estrogen, causing the basal body temperature to rise by about 0.4°C for 12-16 days, thus showing a biphasic change in the basal body temperature curve of the menstrual cycle, which is low before and high after. If there is no pregnancy, the corpus luteum gradually shrinks and stops producing progesterone, the basal body temperature drops and returns to the pre-ovulatory temperature level, and at the same time, menstruation comes. If pregnancy occurs during the month, the body temperature shows a continuous high temperature phase because the corpus luteum is supported by hormones secreted by the embryo and continues to secrete estrogen and progesterone. When there is ovarian malfunction, insufficient luteal production or incomplete atrophy, the rise in body temperature is not obvious and lasts for a shorter period of time. When the body temperature shows a continuous low temperature with no high or low changes, it indicates that the ovaries are not ovulating normally, or that the ovaries are low in function. Women who are ready to get pregnant should estimate the possible ovulation day of the month according to their menstrual cycle to seize the best time to conceive. Of course, nature is also amazing. A few days before ovulation day, because of the influence of estrogen, women will experience an increased sexual desire and naturally produce a lot of clear and odorless leucorrhea, which is the best time to have intercourse.