What causes high uterine artery resistance?

If a woman undergoes a uterine artery resistance test during pregnancy and is found to have increased resistance, there are generally two possible reasons. The first reason is that women's blood coagulation is abnormal, resulting in reduced blood supply in the uterine cavity, which will reflexively cause blood to accelerate, thereby increasing frictional resistance. The second reason is that pregnant women have gestational hypertension. After the blood pressure rises, not only the friction resistance of the uterine artery will increase, but the friction resistance of other blood vessels will also increase. At this time, it may affect the development of test tube embryos, causing delayed language development of test tube embryos or even embryonic development to stop.

Uterine artery friction resistance value range

The range of uterine artery friction resistance reflects the blood filling status of the uterus, and the range during non-pregnancy is between 0.8-2.6. During pregnancy, the uterine artery friction resistance value is higher than 10, which is very likely to cause insufficient uterine blood supply in the early pregnancy, resulting in embryo arrest and increased probability of miscarriage. When the uterine artery resistance value is found to be high, timely administration of aspirin or estrogen drugs for tocolysis treatment may prevent pregnancy from happening again.

The uterine artery friction resistance value is tested in the late pregnancy, especially when the uterine artery friction resistance value exceeds 3 after 35 weeks of pregnancy, which will cause the test tube embryo to not get enough blood supply and may result in fetal death. Therefore, when a woman has experienced unexplained embryo arrest or fetal death in the past, it is best to dynamically test the uterine artery resistance value during pregnancy preparation and pregnancy.

Standard value of uterine artery friction resistance

The standard value of uterine artery friction resistance is less than 3.0. It is the ratio of the blood velocity between the arteries and veins of the fetal umbilical cord, which is mainly related to the growth and development of blood vessels. The larger the value, the better. When it is too high, it means that the blood supply to the embryo is relatively poor. You should pay attention to rest, maintain a positive attitude, and be in a good mood. Avoid heavy physical work, improve nutrition and pay attention to follow-up visits. If the value is within the normal value, it means that the blood supply to the fetus is good. The test is of great significance for the middle and late stages of pregnancy, but has little impact on the early stages of pregnancy.