Association between Brain-Derived Neurotrophic Factor (BDNF) Levels in 2^nd Trimester Amniotic Fluid and Fetal Development

Table 3

Distribution of BDNF (pg/ml) by fetal size group, including the extremes of distribution (divided into three subgroups for each 0^th–10^th and 90^th–100^th centile): significantly higher BDNF levels are observed in the amniotic fluid of severely growth-restricted fetuses (below 3^rd centile).

Fetus	of cases	Mean	value
AGA	31	32,700
SGA < 10^th centile	30	36,300	0.09
SGA < 5^th centile	18	36,900	0.09
SGA < 3^rd centile	10	40,800	0.01
LGA > 90^th centile	18	35,700	0.22
LGA > 95^th centile	5	34,600	0.65
LGA > 97^th centile	2	35,700	0.53