What AFI is polyhydramnios?
An alternative way of measuring amniotic fluid is measuring the largest pocket in four specific parts of your uterus. The sum of these measurements is the amniotic fluid index (AFI). An AFI of 25 centimeters or more indicates polyhydramnios.
What is normal AFI for twins?
The mean AFI for twin A was 136 (95% confidence interval, 133-139), and the mean AFI for twin B was 137.0 (95% confidence interval, 134-140).
How do you calculate AFI in twins?
estimated the amniotic fluid volume by identifying the dividing membrane between the twins and, using the foetal diaphragm, divided the amniotic fluid sac into upper and lower halves measuring the largest pocket free of umbilical cord in centimetres and summed the measurement providing a two quadrant AFI (Figure 5).
Is polyhydramnios common in twins?
During the years 1979 to 1983, 10 cases of acute polyhydramnios have been observed at the University Hospital in Zurich. This corresponds to an incidence of 9% in our twin population.
Can too much amniotic fluid harm baby?
Women with polyhydramnios may experience premature contractions, longer labor, difficulties breathing, and other problems during delivery. The condition can also cause complications for the fetus, including anatomical problems, malposition, and, in severe cases, death. Treatment aims to remove excess amniotic fluid.
What is normal AFI at 33weeks?
The mean AFI is approximately 12-14 cm throughout most of pregnancy, declining after 33 weeks. Above the 95th percentile is approximately 20 cm and below the 5th percentile is approximately 7 cm. The absolute maximum normal AFI is less than 24 or 25 cm.
How many cm of amniotic fluid is normal?
A normal amniotic fluid index is 5 cm to 25 cm using the standard assessment method. Less than 5 cm is considered oligohydramnios, and greater than 25 cm is considered polyhydramnios.
What is the normal range of amniotic fluid index?
What is the normal amniotic fluid index at 36 weeks?
Table 1
| Gestational age | Mean | 50th percentile |
|---|---|---|
| 35 weeks | 14.25 | 14.2 |
| 36 weeks | 13.17 | 13.2 |
| 37 weeks | 12.48 | 12.6 |
| 38 weeks | 12.20 | 12.1 |
Can polyhydramnios affect baby?
Most women with polyhydramnios will not have any significant problems during their pregnancy and will have a healthy baby. But there is a slightly increased risk of pregnancy and birth complications, such as: giving birth prematurely (before 37 weeks) your waters breaking early.
What happens if AFI is high?