PREMATURE PLASMA PROGESTERONE AND ANDROGEN ELEVATION ARE NOT PREVENTED BY ADRENAL SUPPRESSION IN IN-VITRO FERTILIZATION

Objective: To investigate the effects of adrenal suppression with dexa methasone (DEX) on P and androgen profiles during controlled ovarian h yperstimulation (COH) for IVF-ET. Design: Prospective controlled trial . Setting: In vitro fertilization program, Clamart, France. Patient(s) : One hundred twenty IVF-ET candidates aged 25 to 39 years undergoing 120 COH cycles. Intervention(s): Group A: 60 women received a time-rel ease GnRH agonist (GnRH-a) on cycle day 2. After pituitary desensitiza tion was confirmed, 1 mg/d DEX was administered daily until hCG. Ovari an stimulation with hMG was started on the 7th day of DEX. Group B: 60 other women received an identical treatment except DEX was omitted. M ain Outcome Measure(s): Plasma E(2), P, androstenedione (A), and T wer e measured 18 days after GnRH-a, on the 7th day of DEX in group A, and on the day of hCG. Result(s): Peak plasma E(2) levels were similar in groups A and B. After GnRH-a, P and androgen levels were low in both groups. In group A, an additional decrease in these hormones was obser ved after 7 days of DEX. During COH, we observed similar absolute incr eases of P, A, and T in groups A (+0.52, +1.56, and +0.12 ng/mL, respe ctively) and B (+0.55, +1.66, and +0.17 ng/mL, respectively). Conclusi on(s): As expected, DEX lowered additionally P, A, and T levels from v alues achieved after GnRH-a alone, reflecting the adrenal contribution to the circulating levels of these hormones at baseline. Yet, the net increases in P, A, and T seen in COH were unaltered by DEX treatment, indicating that this phenomenon results solely from an effect of exog enous gonadotropins on the ovary.