Is it true that 30% of unexplained miscarriages are related to uterine artery blood flow?

  Experts have come up with a new idea: habitual abortion can be prevented by taking aspirin “Many people know that aspirin can prevent blood clot formation and has a preventive effect on cardiovascular diseases. But few people know that this drug can also be used to prevent and control habitual abortion.” At the “National Advanced Training Course on the Inheritance and Innovation of Classical Chinese Medicine and Gynecological Schools” held at the city’s Chinese Hospital last Saturday, gynecologists from across the country were discussing the latest advances in the discipline. Among them were two new ideas that most women who are preparing to get pregnant or are already pregnant do not know: one is that recurrent unexplained miscarriages are 30% related to abnormal blood flow in the uterine arteries; another is that blood-activating drugs like aspirin can be used to treat habitual miscarriages.  The recurrent miscarriages were originally due to abnormal blood flow in the uterine arteries. After the liberalization of the single two-child policy, more and more people are having children, but some women who are pregnant with their babies can’t keep the fetus in their bellies. The chief physician of the Chinese gynecology department of the city’s Chinese medicine hospital, Zhang Qin, encountered many such mothers-to-be. Before this course, there was a mother-to-be who came to her crying and crying.  ”This pregnant woman is 31 years old, surnamed Huang, and has been pregnant three times before. The strange thing is that each time she started the examination, all her pregnancy indicators were good, but by more than 60 days of pregnancy, she suddenly had a fetal arrest and had to give up the baby.” Dr. Zhang said that all the tests were done for both couples. Excluded endocrine disorders, infections, blood type incompatibility, reproductive tract abnormalities, male sperm malformations and other factors, and the couple’s chromosomes are normal, is not to find the cause of recurrent miscarriage.  Some time ago, Ms. Huang got pregnant again, her heart has been very anxious, afraid of the same situation as the previous times.  ”This time, when she was 60 days pregnant, she had a feeling that something was wrong and came to the hospital for a blood test, and the results showed that the HCG indicator (chorionic gonadotropin, which is related to fetal development) had indeed dropped. Fortunately, the ultrasound came out and the fetus was still alive.” Dr. Zhang said that after seeing this result, she thought about it and decided to ask Ms. Huang to do an additional uterine artery blood flow test.  The truth is that Ms. Huang’s uterine artery blood flow is abnormal, the blood flow resistance is high, the fetus in the uterus lack of blood and oxygen, no wonder it is always unable to keep.  An ultrasound before pregnancy can detect “Internationally, 2 or more fetal losses occurring before 20 weeks of gestation are defined as recurrent miscarriages. Previously, 40 percent of recurrent miscarriages could not be found, and then we found that some of them were related to changes in uterine artery blood flow.” Dr. Zhang said that the high resistance to blood flow in the uterine arteries detected in Ms. Huang implies a pre-thrombotic state such as high blood viscosity or slowed blood flow. This condition, which can lead to poor placental blood supply and embryonic dysplasia, increases thrombus formation. Recent studies have found that the prethrombotic state is closely associated with habitual miscarriage.  ”Abnormal uterine artery blood flow is a pathological process in which multiple factors cause dysfunction or impairment of the hemostatic, coagulation, anticoagulation and fibrinolytic systems. The cause is related to genetic or congenital acquired immune deficiency. This means that the condition is present before pregnancy. Women who are ready to have a baby can detect it by having a vaginal ultrasound before they get pregnant.” Dr. Zhang said that through the hospital’s ultrasound examinations in the last five or six years, it was found that 30 percent of unexplained miscarriages are due to poor blood flow in the uterine arteries.  ”Generally women a week after ovulation, the embryo fertilization and implantation, uterine blood flow is very rich, then conducive to fetal development, if the ‘soil’ itself is not good, there will be many problems. Many mothers-to-be, by the time the high viscosity of the bleeding is detected, the child can no longer be saved.”  Taking aspirin can preserve the fetus “Many women think that it is not good to take blood-activating drugs after pregnancy, which may lead to miscarriage, but people must not think that blood-activating anticoagulants like aspirin can also treat habitual miscarriage.” Dr. Zhang said that the previous woman, Ms. Huang, used aspirin for anticoagulant treatment after she was found to have abnormal uterine artery blood flow, after which her HCG index rebounded and the fetus was preserved.  Several large international studies have confirmed that aspirin in pregnant women does not increase the risk of miscarriage. According to the U.S. National Perinatal Data, a survey of 15,000 cases of aspirin use in early pregnancy and 32,000 cases of aspirin use at all stages of pregnancy did not reveal teratogenic effects on the fetus. The summary is that the benefits outweigh the risks.  ”The use of aspirin for recurrent miscarriage is mainly because aspirin has the effect of inhibiting platelet aggregation, anti-thrombosis and relieving vasospasm, so it can prevent the formation of chorionic thrombosis, thus preventing placental thrombosis and eventually achieving the effect of preserving the fetus.”  Dr. Zhang recommends that women should check the uterine artery blood flow when doing marriage and preconception examinations. If the result is abnormal, you can start taking aspirin from one month before pregnancy under the guidance of your doctor, which can last for the whole pregnancy.