Abstract
Summary
Invertase activity was identified in the rat fetus and amniotic fluid following multiple intravenous injections of the enzyme on days 14 and 15 of pregnancy. Single injections of the enzyme were given on day 13 of pregnancy and samples of conceptuses were taken over an 8-hour time interval. Enzyme analyses showed a low but consistent amount of invertase in the fetus, a gradual decrease in enzyme concentration in the amniotic fluid over the time period studied, a gradual increase in the yolk sac and a relatively stable concentration in the placental labyrinth. Invertase was present in the 12-day fetus 2 hours after injection.
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