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VEGF 164 and VEGF 164b mRNA levels (mean ± SE, n = 4) in ovine amnion and chorion under control and experimental conditions urn drain, continuous drainage of fetal urine without fluid replacement; urn repl, urine drainage with isovolumic fluid replacement; infused, continuous infusion of lactated Ringer's solution (2 L/day) into the amniotic fluid. + P < 0.05 compared to control amnion; *P < 0.05 chorion level compared to amnion level for the same experimental group.
