The process of conception is a complex and delicate one, and any problem in any part of the process can lead to abnormalities in the pregnancy process, which can lead to developmental malformations in minor cases, or the death of the child and miscarriage in serious cases. Nowadays, it is not uncommon for embryonic abortion or miscarriage to occur in the early stages of pregnancy (within 3 months from the last menstrual period), and many friends are very worried about this. Most of the early miscarriages are due to genetic problems in the development of the child, which means that there is a problem with the genes of the child, resulting in the absence of certain enzymes in the body or problems with important organs, so that the child cannot survive and at a certain point will not be able to continue to develop in the mother’s body and will die. In the mother’s body, this is manifested by vaginal bleeding and even the discharge of tissue, leading to miscarriage. This early miscarriage, we know that the vast majority of the process of survival of the fittest, the eliminated children are bad children, so there is no need to feel particularly sorry, as to what causes the child problems, it is not very good check, nowadays, the society, environmental pollution exists everywhere, eat the food, whistle the air, exposure to harmful substances want to hide can not be avoided, so usually, there is no need The reason for the miscarriage is usually not necessary, nor is it possible to conduct a detailed investigation of the cause of the miscarriage. In case of more than 3 early miscarriages, which are called habitual miscarriages, it may be necessary to find the cause in the hospital, and the doctor may check the causes of multiple miscarriages in terms of chromosomes, endocrine, immune function, morphology of the reproductive tract, etc., but it may not always be possible to find the cause. Another common misconception is to check the luteal function when there is a miscarriage during pregnancy, or even when there is no miscarriage. Medications such as progesterone have been somewhat abused. Nowadays, some hospitals, without any abnormalities during pregnancy, also give unnecessary progesterone level tests to pregnant women, and as soon as they check a low level, they start injections or oral progesterone with progesterone, a typical over-diagnosis and treatment. Progesterone is only effective for low luteal function. As mentioned before, most miscarriages in early pregnancy are due to problems with the child itself, and low progesterone is the result, and miscarriages cannot be avoided with progesterone. The period between 4-8 weeks from menopause is a high-risk period for vaginal bleeding. If there is bleeding, serum progesterone tests can help to determine the prognosis. However, this is not an indication for the use of progesterone, so it is sufficient to observe the changes. The blood beta hCG should normally double within 48-72 hours during this time, and if it does not, it suggests the possibility of miscarriage or ectopic pregnancy (Figure). The combination of ultrasound at this time will help the clinician to understand possible problems. Figure: The blue area represents a normal intrauterine pregnancy, and after 2 days of follow-up, βhCG increases by at least 50%. 2 days of follow-up and βhCG increases without reaching the blue area or drops a little, falling in the purple area, is a case of ectopic pregnancy, while a decrease in βhCG found after follow-up suggests a spontaneous miscarriage.