Reference

Androstenedione, testosterone and epitestosterone in the blood of cows during the first six months of pregnancy

Androstenedione, testosterone and epitestosterone in the blood of cows during the first six months of pregnancy. Moestl, E.; Choi, H. S.; Holzweber, E.; Bamberg, E. (Inst. Biochem., Veterinaermed. Univ. Wien, Vienna A-1030, Austria). Zentralbl. Veterinaermed., Reihe A, 30(7), 559-63 (German) 1983. CODEN: ZVRAAX. ISSN: 0300-8711. DOCUMENT TYPE: Journal CA Section: 2 (Mammalian Hormones) Blood levels of androstenedione [63-05-8], testosterone [58-22-0], and epitestosterone [481-30-1] increased in cows from the 11th wk of pregnancy and continued to increase through the 6th mo, when the exptl. was terminated. This increased in blood androgen levels during pregnancy may be due to an increase in the wt. of the placenta with its ability to synthesize androgens.

Separation of gonadal steroid epimers using high-performance liquid chromatography

Separation of gonadal steroid epimers using high-performance liquid chromatography. Watson, T. G.In this study， 68-96-2 and 521-18-6 are also used.; Windmill, D. J.; Bourne, A. R. (Div. Biol. Sci., Deakin Univ. 3217, Australia). Chromatographia, 23(1), 31-2 (English) 1987. CODEN: CHRGB7. ISSN: 0009-5893. DOCUMENT TYPE: Journal CA Section: 2 (Mammalian Hormones) Section cross-reference(s): 12 Chromatog. sepn. of biol. active epimeric steroids was carried out using a combination of normal and reversed phases. Testosterone [58-22-0] was sepd. from its 17a-OH epimer epitestosterone [481-30-1] by using a normal-phase silica column, whereas their reduced 5a-metabolites were sepd. on a reversed-phase system. The sepn. of other gonadal steroids, including the epimers 20a- [145-14-2] and 20b-hydroxypregn-4-en-3-one [145-15-3] is also discussed. The technique is particularly useful for sepg. mixts. of naturally occurring steroid epimers prior to RIA. .