Fetal kidneys checked at 22 weeks one big and one small may grow up normally in the later stage, if the kidneys are abnormally enlarged or shrunken due to diseases, the difference may persist in the later stage.
Normal human kidneys are not the same size, check fetal kidneys one big and one small during pregnancy, the difference between the two is considered to be physiological, no special treatment, in the late stage may be normal growth.
If the kidneys of the fetus have a large size and a small size, it suggests that both sides of the kidneys are developing abnormally, and further prenatal diagnosis should be done to rule out the existence of renal malformations and other malformations in the fetus. If the kidneys have fluid retention, cysts and other conditions, which will lead to persistent enlargement of the kidneys beyond the normal range, it is necessary to choose the treatment plan according to the condition and terminate the pregnancy if necessary.
It is important to do a good maternity checkup during pregnancy to detect any abnormalities so that they can be dealt with in a timely manner.