<prompt> Which of the following is NOT true about amniotic fluid index AFI?It is calculated by adding the veical depths of the largest pocket in each of four equal uterine quadrantsFluid restriction may lower the AFISignificant hydramnios is defined by an index greater than 24 cmThere is steady increase in AFI after 36 weeks  <response>: Amniotic fluid index AFI is calculated by adding the veical depths of the largest pocket in each of four equal uterine quadrants. Significant hydramnios is defined by an index greater than 24 cm. Fluid restriction or dehydration may lower the AFI. Peak AFI is seen at approximately 32 weeks followed by a steady decline until 42 weeks. Ref: Cunningham F.G., Leveno K.J., Bloom S.L., Hauth J.C., Rouse D.J., Spong C.Y. 2010. Chapter 21. Disorders of Amnionic Fluid Volume. In F.G. Cunningham, K.J. Leveno, S.L. Bloom, J.C. Hauth, D.J. Rouse, C.Y. Spong Eds, Williams Obstetrics, 23e. 