Biochemistry is usually not required to sit for a month. Biochemistry is a condition in which fertilization has occurred after ovulation, i.e., a fertilized egg is formed, but the fertilized egg fails to implant, or the egg ages and combines with the sperm and is difficult to implant, and elevated human chorionic gonadotropin can be detected in the blood, and no gestational sac can be detected by ultrasound. Because the fertilized egg does not attach, there is no damage to the uterus, and there is a brief fluctuation in hormones, menstruation is usually delayed and a grayish-white membranous discharge may occur. Biochemical pregnancy is generally equivalent to experiencing a menstrual period, which may sometimes be slightly heavier and usually does not require menstruation. More pregnant women experience biochemical pregnancy without realizing it, and even if they do, there is no need to go through the monthly cycle, as long as they pay attention to their diet and adjust it well, it will not affect their next pregnancy. Note that after the biochemical should rest well, if the body has symptoms of discomfort, should promptly seek medical treatment. And women should also pay attention to the menstrual situation, if there is a delay in menstruation and other abnormalities, timely consultation with the doctor to clarify whether there is a pregnancy and diagnosis and treatment.