P–685 Luteinization after final oocyte maturation induction is not compromised in women that receive double dose of Gonadotrophin-releasing hormone antagonists during controlled ovarian hyperstimulation

Abstract

\n \n \n Does the use of double dose of GnRH antagonists during COH in women with risk of premature LH surge alter luteinization after final oocyte maturation induction?\n \n \n \n The use of double dose of GnRH antagonist in women with risk of premature luteinizing hormone surge dosent affect luteinization after final oocyte maturation induction.\n \n \n \n GnRH antagonists are used to prevent a premature LH surge during controlled ovarian hyperstimulation. The antagonists directly inhibit gonadotrophin release within several hours through competitive binding to pituitary GnRH receptors, producing a rapid suppression of LH and FSH, with no initial flare effect. In women with diminished ovarian reserve (DOR) it is not uncommon that premature luteinization cannot be completely prevented using a daily dose GnRH antagonist. To date, no study has evaluated the effects of using a daily double dose of GnRH antagonists to prevent a premature LH surge and its effect on luteinization after final oocyte maturation induction.\n \n \n \n This monocentric retrospective analysis evaluated the effect on luteinization after final oocyte maturation induction in twenty women during COH who received a daily double dose of GnRH antagonists (Cetrotide 0.25\u2009mg/mL, Merck) from January 2020 to December 2020.\n \n \n \n Women with severe DOR and history of premature luteinization during COH received a double dose of GnRH antagonist when the leading follicle reached 12–14\u2009mm (am and pm). When two follicles reached ≥18\u2009mm in diameter, final oocyte maturation was induced with dual trigger using Leuprolide acetate and hCG. Progesterone, estradiol, bHCG, and LH levels were measured the day after final oocyte maturation induction to assure adequate luteinization.\n \n \n \n In total twenty women were included in the analysis. Mean age 36.8± 4.2, AMH 0.65± 0.32\u2009ng/ml, baseline antral follicle count 4± 2.3, serum hormone levels the day of ovulation induction trigger: progesterone 0.89± 0.34\u2009ng/ml, LH 1.6± 2.1\u2009ng/ml, estradiol 1235 ± 1420\u2009pg/ml. Post-surge serum hormone levels average reached adequate levels: estradiol 1645 ± 1116\u2009pg/ml, progesterone 20.4 ±2.2\u2009ng/ml, LH 62.66± 10.5\u2009IU/ml and, bHCG 247±115\u2009IU/ml. A total of 76 oocytes were retrieved (3.8± 0.8 oocytes per patient), 63.1% (48/76) MII, 22% (17/76) MI, 14% (11/76) GV.\n \n \n \n The retrospective nature of the study, small sample size, and potential variability in the study center’s laboratory protocol(s) compared to other reproductive treatment centers may limit the external validity of our findings.\n Wider implications of the findings: The daily use of double dose of GnRH antagonists during COH offers the possibility of preventing a premature LH surge in women with DOR with high risk of early ovulation, without compromising luteinization after final oocyte maturation induction.\n \n \n \n NA\n