[Effects of ovarian stimulation on serum concentrations of lipids and ketone bodies in patients undergoing IVF/ICSI treatment].

Objective: The ovarian stimulation increase the estradiol concentration in comparison to the one observed in the menstrual cycle. The aim of the study was to determine the influence of ovarian stimulation on serum concentrations of lipids and ketone bodies in patients undergoing IVF/ICSI treatment.

Patients And Methods: 50 patients were included in this study. All patients underwent an ovarian stimulation either with recombinant follicle stimulating Hormone (Gonal-F, n = 28) or human menopausal gonadotropin (Menogon, n = 22) after pituitary down-regulation with Goserelin or Triptorelin. Five blood samples were taken: before treatment, at the beginning of ovarian stimulation, on the day of HCG injection for the ovulation induction, on the day of follicle aspiration and 14 days after embryo transfer. Afterwards, the samples were analysed with regard to the concentrations of triglyceride, total-cholesterol, HDL-/LDL-cholesterol, acetoacetate, beta-hydroxybutyrate and alpha-ketoglutarate.

Results: During the ovarian stimulation, total-cholesterol andA'LDL-cholesterol decreased significantly (p(Chol) < or = 0.001; p(LDL) < or = 0.001), whereas the concentration of HDL-cholesterol increased significantly (p(HDL) < or = 0.001). Furthermore, a significant increase of beta-hydroxybutyrate and alpha-ketoglutarate has been detected (p(HBS) = 0.039; p (KG) = 0.023).

Conclusions: The observed changes in serum concentrations of lipids and ketone bodies began with the application of gonadotrophins for stimulation and persisted until the end of the treatment. Therefore, the increase of estradiol, stimulated by gonadotrophins, seems to be responsible for the changes in the serum concentrations of lipids and ketone bodies. All women undergoing ovarian stimulation should be monitored for long-term thrombogenic and atherogenic risks.