Antiestrogen antibodies, oral contraception and systemic lupus erythematosus.

Oral contraceptives (OC) are suspect to play a role in systemic lupus erythematosus (SLE). It has previously been shown that OC can induce immune reactions in a number of normal women. Antiethinylestradiol antibodies (anti-EE Ab) have been detected with a radioimmunoassay method in 25-30% of healthy OC users. In the present paper, a comparative study of 123 controls and 55 SLE patients, with or without OC use, indicates (1) that in the disease-free group, anti-EE Ab were detected in 30% of OC users, and only in OC users; (2) that in the SLE group, anti-EE Ab were observed in 57% of female OC users, and, surprisingly, in 13% of men also, a finding already reported by other authors.