Although the awareness rate of “hidden abortion” is low, the incidence is as high as 30% to 40%. When it comes to abortion, abortion and spontaneous abortion have been known for a long time. However, in recent years, experts have found that some women of childbearing age who are unable to find out the cause of infertility may have unknowingly become pregnant and suffered a miscarriage. In other words, the fertilized egg, which could have given birth to a baby, has “passed through” the uterus of such women, but “passed through without staying” and was unknowingly expelled from the body. In recent years, there has been a new medical term for this type of undetectable miscarriage – “hidden miscarriage”. There are reports that its incidence is as high as 30% to 40%, but because of its hidden nature, there are still not many clinical studies, and many women are unaware of “hidden abortion” even if they have suffered it. Miss Zhang and her husband are over 35 years old, work has been very busy did not care to have children. A couple of years ago, under the repeated urging of the elderly in the family, the young couple stopped contraception and began planning for the birth of a large plan. But after a year, Miss Zhang still has no “movement” on her body. The couple did a variety of tests in different hospitals, the results are very normal, can not find the biological reasons for not pregnant. Six months ago, under the guidance of doctors, Miss Zhang began to learn to measure ovulation, and a few days before and after the monthly ovulation period to actively “make a man”. Generally after those days, no matter how busy and tired, Miss Zhang will be very attentive to get up in the morning with “early pregnancy” pregnancy test stick morning urine. One month, the test results were clearly positive for two consecutive days, the young couple was very happy about this, thinking to wait a little longer, there is a clear reaction and then tell the family elderly. That month, the time to come to the period, Miss Zhang’s heart both happy and nervous, but I did not expect to postpone a few days, the period still came as usual. Miss Zhang disappointed more strange: many of the sisters around the pregnancy test are accurate, remember that she twice measured positive, rather than a weak positive not quite sure, which means that nine out of ten is pregnant, how will still have a period? ”This is indeed a new term.” The doctor explained that the fertilized egg did once exist in Miss Zhang’s uterus, but within a few days of the period of incubation, for various reasons did not take root in the uterus to stay, but in the arrival of menstruation along with the unwitting flow away. Reminder “hidden miscarriage” there are two situations There are reports that in recent years “hidden miscarriage” frequently “appear”, the incidence even reached 30% ~ 40%, some experts clinical observation found Some women of childbearing age who cannot find out the cause of infertility may have unknowingly become pregnant and then suffered a “hidden miscarriage”. ”This phenomenon is rarely noticed, but there are many people with such problems.” There are two scenarios: one is when a fertilized egg is formed and “passes through the hall” in the uterus, following the flaking endometrium; the other is when a fertilized egg is laid in the uterus and even forms a fetal sac, but the embryonic development soon stops and is also cleared out of the body along with the flaking endometrium. Since the process of “hidden abortion” does not have much impact on the endometrium, women who suffer from it usually have their period as scheduled and are unaware of it, let alone pay attention to it and take relevant preventive measures. “At present, among obstetricians, not much is known about this, and the general public is certainly unheard of.” The low awareness rate of “hidden abortion” is not because it is not important enough, but because of the lack of a large sample survey. In particular, there are not many women of childbearing age who are willing to cooperate, so it is still difficult to conduct prospective studies.