“…Many stimuli cause the release of AVP in the foetus: hypoxia (Rurak 1978;Stark et al 1979;Robillard et al 1981;Stark et al 1984), haemorrhage (Rose et al 1978;Rurak 1979), umbilical cord constriction (Daniel et al 1978) and increased plasma osmolality (Weitzman et al 1978;Siege1 et al 1980;Bennett & Rose 1989). Fetal hypotonicity, induced by the infusion of hypotonic saline to the ewe, is claimed to cause a small, but significant, decrease in fetal plasma AVP (Leake et al 1987).…”