Pregnant women need to undergo many examinations during pregnancy. On the one hand, these examinations are to ensure the mother's physical health and avoid complications during pregnancy. On the other hand, they need to understand the growth and development of the fetus, whether it is normal, and reduce the number of defective children. Recently, a pregnant woman has undergone an examination and the results showed that the fetal renal pelvis is wide. She wants to know what causes the fetal renal pelvis width?
Fetal renal pelvis width, also known as renal pelvis dilation in clinical practice, mainly refers to the abnormality of the fetal kidneys, that is, the fetal renal pelvis width exceeds 10 millimeters. Ultrasound examination is the most effective method to observe whether the fetus has renal pelvis width. For normal fetuses, the horizontal cross-sectional measurement of the renal pelvis should be below 5 millimeters.
There are several reasons that can cause fetal renal pelvis width. Firstly, if the pregnant mother suddenly drinks a large amount of water, the water content in her body may increase, which may lead to fetal renal pelvis width. As long as the mother metabolizes the water in her body, the fetus will return to normal. Secondly, when the fetal bladder is excessively filled, it will compress the ureter, causing the phenomenon of renal pelvis width.
The third reason is that pregnant women experience relaxation of the smooth muscles in the urinary system under the action of progesterone hormones, leading to hydronephrosis. In addition, fetuses in the uterine cavity may also experience widened renal pelvis under this high hormone state. However, studies have shown that if most fetuses are observed repeatedly within 2 hours, the fetal renal pelvis measurements can vary in size.
