Objective: To evaluate the luteinizing hormone serum preovulatory levels and correlate them with the embryo number and quality, and with the fertilization and clavage rates.
Study: Prospective, descriptive and observational.
Material And Methods: We included 286 patients that underwent to IVF-ET program, we excluded patients with no mesurement of LH preovulatory levels, or patients that in the oocyte retrieval we do not found oocytes. The protocols for pituitary inhibition were: stop Lupron, long luteal phase and GnRH antagonist, the ovarian stimulation was realized with recombinant FSH. The studied variables were: LH preovulatory levels, number and quality of oocytes, fertilization and clevage rates and embryo quality. Statistical analysis was done with p Pearson and ANOVA tests.
Results: The mean age for patients was 34 +/- 3.96 years, the principal factor of infertility was tubal and pelvis pathology. The mean LH preovulatory levels were 2.19 +/- 1.83 UI/L by patient, we observed a negative correlation between LH levels and number of oocytes retrieved (p = -0.157, IC 99%), and the correlation between LH levels and number of metaphase 2 oocyte was negative too (p = 0.113, IC 95%). We observed greater levels of LH (3.15 UI/L) in the degenerated oocytes during oocyte retrieval. We did not found a statistical correlation between fertilization and cleavage rates with LH levels. LH preovulatory levels of 0.85 UI/L could predict good quality oocytes with a sensitivity of 72% and specificity of 25%.
Conclusions: Normogonadotrophic patients without deep suppression of gonadotrophins by the use of GnRH analogues, high LH preovulatory levels correlates with a less number of oocytes, and with degenerated oocytes. Preovulatory LH levels of 0.85 UI/L could predict good quality oocytes.
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