Recently, I made a small survey, all infertility patients who come to my clinic, I ask them a question: do you know when your lover ovulates? According to my observation, more than 90% of them are not sure, and even more, some of them even wonder about my question: What does infertility have to do with knowing ovulation? Why do I need to know my lover’s ovulation? It may be understandable that infertile men do not know their lover’s ovulation, but what is incomprehensible is that as a woman, seven out of ten do not know the day of ovulation either. Of course, the woman is better than the man, but there are some bitter “jokes”. The reproductive health department of Shaoxing Women’s and Children’s Health Hospital Zhang Wenwei There is a woman who knows that she has to live together during ovulation, but she doesn’t know how to calculate it, but she is very confident to live together on a regular basis. I asked her if she knew the day of ovulation, and she confidently said, a few days before her period, I looked at her seriousness, really some crying and laughing. She and her lover’s elaborate work on her “ovulation day” turned out to be a game of love. Another woman, I asked her if she knew how to count her ovulation date. She said: I know, I know, we are according to the ovulation period to the schedule of conjugal life, her ovulation period is calculated to be good, but she only allows her lover to have a conjugal life on the day of ovulation, according to her words, so as to be able to conceive. I couldn’t help but laugh when I heard that she was so scheduled to have sex, isn’t this too mechanical? Are we back to the primitive state? Many animals only mate in heat, while human couples do not live only for fertility. It is for fertility, you can’t just press the row once, maybe your ovulation day is not as you count it? In practice, I have encountered many cases of this kind, I do not quite understand, as a general person, you can not understand ovulation, but you are infertile patients, how can not understand this knowledge? Every time I have detailed this knowledge with my infertile patients, they find it very refreshing and useful. Some of them complain that the other doctors don’t talk to us about it. I tell them that this is actually a common knowledge, something they can know through study, and that there is no need to blame the doctor for common sense things that are not deeply learned. So, how do you know your ovulation date? There are quite a few ways to do this: Calculation method: For women with regular menstrual cycles, they can calculate the ovulation date more accurately. Menstruation is the periodic bleeding of the endometrium under the influence of the ovarian cycle. The first half of the menstrual cycle is the follicular phase and the second half is the luteal phase, how are these two phases separated? Quite simply, they are bounded by ovulation. A woman of normal reproductive age ovulates once a month, usually only one. The differences in the menstrual cycle depend mainly on the difference in the length of the follicular phase, while the luteal phase is relatively stable, usually two weeks (14 days). Therefore, women with regular menstrual cycles can calculate ovulation on their own, i.e. about 14 days before their next menstrual period, when intercourse is most likely to result in conception. Sensory method: It is easier and safer to determine the day of ovulation according to the nature of the leukorrhea. The main components of leukorrhea are cervical mucus and vaginal exudate, which contain shed vaginal epithelial cells and bacteria, etc. The cervical mucus is controlled by the hormones secreted by the ovaries. During the first half of the menstrual cycle, the amount of leucorrhea gradually increases from little to little. When the follicles mature and the eggs are about to be expelled, the leucorrhea becomes increasingly thin and translucent. During ovulation, the body’s estrogen secretion reaches its peak and the amount of cervical mucus (leucorrhea) is at its highest, often with thin ribbons of leucorrhea that can sometimes be stretched to more than a dozen centimeters (i.e., the degree of stretching), like egg whites, when the woman’s lower body is most moist. Measurement method: Basal body temperature can be measured to accurately grasp their own ovulation period. Basal body temperature is the temperature measured after 6-8 hours of sleep and waking up without any activity (such as talking, eating or getting up). The measured body temperature is recorded by date and linked into a curve called the basal body temperature curve. The basal body temperature of ovulatory menstruation is biphasic, i.e. the temperature is low before ovulation and high after ovulation, the turning point between the two is the day of ovulation, and the difference in basal body temperature before and after ovulation is about 0.4℃. Basal body temperature is an objective indicator to determine the day of ovulation and can be easily measured at home by yourself. It is best to measure several menstrual cycles in a row so that you can grasp the pattern of your ovulation. In addition, when measuring the basal body temperature, you should exclude factors that may affect the basal body temperature such as flu and fever, progesterone application, etc. Basal body temperature is one of the most accurate methods to capture the day of ovulation. Ultrasound monitoring of the day of ovulation is a feasible method, but it is tedious and expensive, and is a last resort. After the 10th day of the menstrual cycle, the follicle can grow to a size of more than 1cm in diameter, it will gradually grow and rupture when it reaches a certain level, and the moment it breaks is the moment of ovulation. In the first 10 days of the menstrual cycle, ultrasound is done every 3 to 4 days, and after the 10th day, ultrasound is done once a day or every other day. In conclusion, ultrasound is a good way to monitor follicles and ovulation days in a non-invasive, painless and accurate way. In addition, you can also use test strips to measure the day of ovulation. The knowledge of ovulation day, I think, is very important for infertile couples. It is a basic knowledge that infertile couples should know, and it is a knowledge that infertile couples should know before undergoing infertility treatment.