[Coagulative activity of the amniotic fluid]

An ultracentrifugation study has shown thromboplastin to be the only blood coagulating agent, present in the amniotic fluid (AF). Its AF level shows no correlation to the rate of intrapartum or early postpartum thrombohemorrhagic complications, which may rather be related to the AF volume penetrating into the bloodstream. AF thromboplastin has also been shown to have an antiheparin activity.