Abstract
Cholesterol and phospholipids of serum, liver and aorta were determined daily, during a 7-day period, following a dose of 5 mg of estradiol cyclopentylpropionate, to evaluate the time response of 3-week-old cockerels. Early and significant rise of serum and liver cholesterol and phospholipids was observed. Increase of aortic lipids was slower to appear, but significant changes in these parameters were also noted.