Testosterone serum levels in rats with unilateral ovariectomy performed at 32 days of age. Mean ± S.E.M. of testosterone levels in serum. Left (L-LAP) or right (R-LAP) laparotomy, left (L-ULO) or right (R-ULO) unilateral ovariectomy rats. Animals were sacrificed at various times after surgery. *p < 0.05 vs. its respective sham-surgery group (Student's t-test).