Amniotic fluid 242mm is within the normal value, generally will not cause certain effects on the fetus.
Amniotic fluid 242mm is the amniotic fluid index, the general normal range is within 50-250mm, if more than 250mm, it is called amniotic fluid excess, of which 250-350mm is mild amniotic fluid excess; 360-450mm is moderate amniotic fluid excess; >450mm is severe amniotic fluid excess.
Excessive amniotic fluid is mainly related to fetal structure, multiple pregnancies, placental cord lesions, etc. It is also related to whether the mother has comorbidities and underlying diseases.
Regular ultrasound examinations should be performed during pregnancy to understand the condition of the fetus and amniotic fluid. If you have excessive or low amniotic fluid, go to the hospital to check the cause of the abnormality in amniotic fluid, and treat it under the guidance of the doctor in time.