Flashcards in Chapter 57 Amniotic Fluid, Fetal Membranes, and Fetal Hydrops Deck (14):
Amniotic fluid is produced by...
umbilical cord, the membranes, lungs, skin, and kidneys
Fetal production of urine and the ability to swallow begins between ___ and ___ weeks gestation.
8 and 11
The volume of amniotic fluid increases progressively until about ____ weeks' gestation.
An average increment increase of amniotic fluid of 25ml from the ____ to the _____ week.
An average increment increase of amniotic fluid of 50ml from the ____ to the ____ week.
From ___ to ____ weeks' gestation , amniotic fluid may appear rather generous.
Towards the end of the pregnancy, at between ___ and ___ weeks' gestation, a general decline is seen in the amniotic fluid.
38 and 43
AFI values are relatively stable after ____ weeks until the end of the third trimester. The AFI peaks late in the third trimester of pregnancy, with a rapid decline near term.
Normal amniotic fluid correlates with AFI of ____ to ____ cm.
Oligohydramnios correlates with an AFI of less than _____ cm, with the largest vertical pocket measuring ___ cm or less.
Polyhyramnios correlates with an AFI of greater than ___cm with the largest vertical pocket measuring ____ cm or more.
The maxium vertical pocket assessment of amniotic fluid is done by identifying the largest pocket of amniotic fluid, which should measure greater than ___ cm.
Chronic polyhydramnios usually occurs between ___ week and term.