Isolated low-normal amniotic fluid volume in the early third trimester: association with adverse perinatal outcomes^a

Abstract

Low-normal AFI in the early third trimester increases the risk for subsequent delivery of an SGA infant and indicated PTB.

Borderline amniotic fluid index as a predictor of adverse perinatal outcomes

“…Out of 83 borderline pregnant patients only 2 babies had an APGAR of  7 in 5 minutes. Similar finding was observed in other studies which were not statistically significant 14,15 .…”

“…Assisted vaginal deliveries and emergency lower segment caesarian sections due to fetal distress showed a statistically significant association with borderline AFI. It is also proved by three previous studies even though one study compared low AFV with normal AFV 14,15 . Out of 83 borderline pregnant patients only 2 babies had an APGAR of  7 in 5 minutes.…”

“…A study conducted in Lahore by Shahida defined borderline values as AFI of 5-10 cm by using the five (5) cm value as lower limit by standard definition of oligohydroamnios 14 . In contrast, a research in Japan by Hashimoto used AFI of 8-12 cm as borderline using the alternate definition for oligohydroamnios 15 . AFI range of 5-10 cm was used as borderline value for the interventions used in Lahore study as it is widely accepted 14 .…”

Assessment of ultrasound and Doppler parameters in the third trimester of pregnancy as predictors of adverse perinatal outcome in unselected pregnancies

“…However, monitoring of the amniotic fluid volume in low-risk pregnancies remains controversial. Hashimoto et al [11], in their retrospective cohort study, assessed two groups of low-risk pregnant women (low-normal AFI 8-11 cm) and (mid-normal AFI 12-19.9 cm) between 28 and 31.9 weeks of gestation and observed that the low-normal AFI group had higher preterm delivery and SGA rates. In another study, involving 3740 unselected pregnant women within two weeks before the delivery, the borderline AFI group (5-8 cm) presented a 3-fold increase in the incidence of adverse perinatal outcomes as compared to the normal AFI group (> 8 cm).…”

“…However, some studies observed www. journals.viamedica.pl/ginekologia_polska increasing adverse perinatal outcomes in unselected pregnancies presenting isolated low-normal early amniotic fluid volume [11], and increased maturity of the placental grade in smoking pregnant women [12].…”