Lipid and Lipoprotein Levels following Pure Estradiol Implantation in Post-Menopausal Women

8 post-menopausal, post-oophrectomy and hysterectomy women had a 100-mg pure 17Β-estradiol pellet installed in their subcutaneous abdominal tissue. The pellet caused a marked systemic hormonal effect in these patients causing an up to 30-fold increase in plasma estradiol and a marked decrease in follicle-stimulating hormone levels. It showed a significant increase in plasma high density lipoprotein (HDL) and HDL to total cholesterol ratio levels, no change in plasma triglycerides and very low density lipoprotein levels and some decrease in total cholesterol and low density lipoprotein cholesterol concentrations. These results differ from the previously reported influence of synthetic hormonal preparations on the same plasma lipids and lipoproteins.