For women with regular menstrual periods, the average cycle lasts 28 days and the ovulation day is on the 14th day before the next menstrual period, while the ovulation period includes the 5 days before and 4 days after the ovulation day. When a woman is ovulating, she may experience an increase in basal body temperature. Ovulation can be detected by ultrasound, pregnancy and ovulation test, cervical mucus measurement, etc. For women who want to detect ovulation on their own, they can obtain the ovulation status by measuring the basal body temperature. It takes 3-4 months of measurement data, which shows that the body temperature rises 0.3-0.5℃ during ovulation and returns to normal temperature in other periods. In addition, for women with regular menstruation, their ovulation period is also regular. It is important to maintain a good mood in daily life, avoid overexertion and eat fresh vegetables and fruits to ensure that the menstrual cycle remains regular.