Steroids, Umbilical cord plasma

Hydhoxy-A Steroids in Arterial and Venous Umbilical Cord Plasma"... [Pg.159]

Proportion op Individuai. 3/S-Htdhoxy-A Steroids in Umbilical Cord Plasma Mono- and Diconjugated ... [Pg.188]

At least three, 3j8-hydroxy-A steroids have been shown to be present in urine in diconjugated form of these 16 S-OH-DHA and 21-OH-preg-nenolone are hydrolyzed by the Helix pomatia enzyme, but androstenediol (17a) is freed only by solvolysis (Sll, Fig. 5). The proportions of the individual 3j8-hydroxy-A steroids found in umbilical cord plasma mono-and diconjugated are shown in Table 15. Very little is free, but Simmer and co-workers (S21) have established a concentration of free 16a-OH-DHA of approximately 0.4 jag/100 ml. [Pg.188]

Steroids in Umbilical Cord Plasma Endocrinol. Exp. 9(3) 205-214 (1975) CA 85 58985w... [Pg.223]

Comparison of Steroid Concentrations (/ig/100 ml) in Plasma from the Maternal Peripheral Vein (PV), Umbilical Cord Artery (CA),... [Pg.158]

From Table 5 it will be seen that the cortisol cortisone ratio of 0.7 1 in mixed arterial and venous umbilical cord blood is a complete reversal of the ratio of 11 1 in maternal blood. This change could be produced by the placenta because blood milked from a cord at delivery is predominantly venous. James (J3) has measured the two steroids in samples of pooled venous and pooled arterial plasma although he found the same levels (7, ag/100 ml) in each for cortisol, the level of cortisone was lower in the artery (10.5 jug/lOO ml) than in the vein (14.0 jug/lOO ml), indicating a supply of cortisone from the placenta. The considerable activity of... [Pg.165]

Fig. 6. The content of the major 3j8-hydroxy-A steroids in adult male urine, infant urine, term amniotic fluid, and plasma obtained from the umbilical cord at birth.

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