TY - JOUR ID - 45233 TI - The Impact of Pituitary Blockage with GnRH Antagonist and Gonadotrophin Stimulation Length on The Outcome of ICSI Cycles in Women Older than 36 Years JO - International Journal of Fertility and Sterility JA - IJFS LA - en SN - 2008-076X AU - Santana, Rosane AU - Setti, Amanda Souza AU - Maldonado, Luiz Guilherme AU - Valente, Fernanda Montenegro AU - Iaconelli, Carla AU - Iaconelli Jr, Assumpto AU - Jr, Edson Borges AD - Fertility-Assisted Fertilization Center, Av. Brigadeiro Luis Antônio, São Paulo, SP, Brazil AD - Fertility-Assisted Fertilization Center, Av. Brigadeiro Luis Antônio, São Paulo, SP, Brazil;Sapientiae Institute-Educational and Research Center in Assisted Reproduction, Rua Vieira Maciel, São Paulo, SP, Brazil Y1 - 2014 PY - 2014 VL - 8 IS - 2 SP - 135 EP - 142 KW - Gonadotrophins KW - implantation KW - Intracytoplasmic Sperm Injection DO - N2 - Background The objective of this retrospective cohort study was to evaluate whether the length of pituitary blockage with gonadotrophin-releasing hormone (GnRH) antagonists or the stimulation period influence intracytoplasmic sperm injection (ICSI) outcomes in patients older than 36 years of age. Materials and Methods In this retrospective study, a total of 138 couples with maternal age >36 years undergoing ICSI with an antagonist protocol were included. The influences of stimulation and suppression length on the response to ovarian stimulation and ICSI outcomes were investigated. Receiver operating characteristic curve (ROC) analysis was performed to assess the predictive value of the stimulation period for achievement of implantation and pregnancy. Results The gonadotrophin stimulation length negatively influenced the implantation rate (RC: -4.200; p=0.023). The area under ROC curve (AUC) could distinguish between women with positive and negative implantation (AUC: 0.611; CI: 0.546-0.673) and pregnancy (AUC: 0.593; CI: 0.528-0.656). The threshold value demonstrated a high negative predictive value on likelihood of implantation (p=0.0032, 90% sensitivity) and pregnancy (p=0.0147, 87.1% sensitivity) when patients underwent more than 10 days of stimulation. Conclusion The stimulation period negatively influences the implantation rate in women older than 36 years. A stimulation interval greater than 10 days is associated with a negative predictive value for the chance of implantation and pregnancy. UR - https://www.ijfs.ir/article_45233.html L1 - https://www.ijfs.ir/article_45233_9925d59cfe5f7f7e28bf966f8a92a5d9.pdf ER -