The effect of hexoestrol implantation on growth and certain carcass characteristics of fattening steers

Colloidal gold-based immumochromatographic assay for detection of diethylstilbestrol residues

“…Much evidence has been documented indicating that exposure to both natural and synthetic chemicals at low levels may lead to potential risk to humans and wildlife. It has been associated with an increased risk of cancer among the women who took the hormone and their children (Dinusson et al, 1950;Gill et al, 1956;Aitken and Crichton, 1956;Berg et al, 1999;Piersma et al, 2002). In most countries, the use of DES has been banned due to its teratogenic (Hewitt et al, 2002), mutagenic (Yu et al, 2005;Rambaud et al, 2005) and carcinogenic properties (Li et al, 1983;Li and Li, 1984;Liehr et al, 1985;Jan et al, 1998), so it is necessary to control its abuse.…”

Hexoestrol implantation of steers fattened at pasture I. Effects on growth and herbage intake

“…Lamming (1957) has pointed out that most of the work with hormones and beef cattle has been done in the U.S.A. under feedlot conditions. In this country Aitken and Crichton (1956), Dodsworth (1957) and Lamming (1957 and all obtained increases in rates of gain with implantation. Lamming found that responses in steers varied from 0 to 15% increase in gain per day in spring, about 20% in summer, 40% in autumn, in each case on pasture and up to 60% under winter feeding conditions.…”

“…Many experiments carried out in the U.S.A. with stilboestrol implantations have shown an increase in consumption of feed by treated cattle in feed-lot but they generally required less total feed per unit of gain than untreated cattle. In the experiment carried out by Aitken and Crichton (1956) the mean daily dry matter consumption was 21 -0 lb, for the control and 21 -6 lb. for the treated steers.…”

Determination of hexoestrol residues in animal tissues based on enzyme-linked immunosorbent assay and comparison with liquid chromatography–tandem mass spectrometry

“…When used illegally in cattle feed, HES improved growth rate and increased feed conversion [1][2][3][4][5]. However, in most countries, the use of HES has been banned currently due to its teratogenic [6], mutagenic [7,22] and carcinogenic properties [8][9][10][11].…”