Vaginal bleeding in early pregnancy is actually a common symptom in early pregnancy. But it is also an early basis for doctors to diagnose preterm miscarriage. Whenever such a symptom occurs, mothers are nervous. What if the baby you are expecting is miscarried? Today I want to tell you that bleeding in early pregnancy is not exclusive to preterm miscarriage, but many normal pregnancies are also likely to have vaginal bleeding. Here is how it happens: The original shape of the uterus is a pear shape, with a large uterine body and a small cervix. The inner surface of the uterine body has a layer of endometrium which continues down to the endocervical canal lining. When pregnancy occurs, the endometrium undergoes metaplastic changes, which continue down to the cervical canal. At the same time the pregnancy located inside the uterus gradually grows while the uterus gradually grows. One should note that in fact, only the body of the uterus really grows significantly; the cervix is subject to passive traction. At this time, the metaplasia of the lower part of the uterus and the cervical canal becomes misaligned, and the endometrium of the local metaplasia of the cervical canal will be peeled off due to the misalignment, and due to the peeling, bleeding will naturally occur. Since the area of peeling is very small and confined to the lining of the cervical canal, the amount of bleeding is very small, usually just a few drops, which may remain inside the cervical canal temporarily and come out after a while as brown or coffee-colored, or come out directly as drops of fresh blood. Since this detachment process occurs slowly, the growth of the uterine body is a continuous process, and this dislocation and detachment process does not end until this growth process makes the uterine body grow completely in a spherical shape and the cervix is equivalent to a spherical tip. So the manifestation of this bleeding may also be intermittent, or continuous, before and after, and may even last for more than 10 days.? However, it should be noted that the amount of bleeding in this kind of physiological abruption of the cervical canal must be very small, the smallest may be the size of a dollar coin soiled underwear, or occasionally a little more, but not much more than that, and it is transient, not always more, and is usually not accompanied by obvious abdominal pain. In early pregnancy, there can also be mild lower abdominal pulling pain, vague pain, distension and other manifestations, and most pregnant women can feel these symptoms if they pay close attention to them. The cause of this pain is most likely due to the pulling of the uterine ligaments as the uterus grows. Some of them are felt in the groin on both sides or in the middle of the abdomen. However, it is important to note that these symptoms should be very mild and do not continue to worsen and do not interfere with daily life, they may recur but will eventually disappear. The purpose of telling you all this is to remove the tension when these seemingly miscarriage symptoms appear, but if you feel that these similar symptoms are beyond our expectations, you must go to the hospital in time to avoid regrets. One final tip: animal reproduction is, in itself, a process of accepting the superiority of nature, and humans are no exception. Our embryos must go to passive acceptance of natural selection. In actual observation, we have found that nature inherently has a natural abortion rate of about 15%. The vast majority of these 15% spontaneously aborted embryos are of questionable quality themselves. Some of them are even chromosomally incomplete. So, for those pregnant mothers who do experience a preterm miscarriage, they should not get hung up on the matter. As a natural survival of the fittest, we should be thankful that such non-fine embryos can be eliminated at an early stage. And as a random event, most couples who have had a spontaneous miscarriage, or stillbirth, do not affect their subsequent pregnancies. In the case of couples with recurrent miscarriages or stillbirths, we consider the presence of genetic, immunological and other self-inflicted factors.