What is the normal range for the amniotic fluid index (AFI) in the third trimester of pregnancy?
Disease description:
I am nine months pregnant, and I am now in the third trimester. I need to have my amniotic fluid index (AFI) measured. Could you please tell me what the normal AFI range is during the third trimester?
Doctor's answer (2)
Dr. Liu Xiuyan
Hello, during pregnancy, a woman’s amniotic fluid index (AFI) ranging from 5 to 18 cm is considered normal. In the third trimester, it is common for amniotic fluid volume to increase; therefore, the AFI tends to be higher—typically within the normal range of 10–18 cm. If the AFI falls below or exceeds this range, prompt medical evaluation and treatment are recommended. We hope this information is helpful to you. Wishing you a happy and healthy life!
