Li Pei

No ORCID on file · 4 papers in corpus
observational 2026
High serum FSH levels on day 7 of stimulation are negatively associated with oocyte retrieval in GnRH antagonist protocols: real-world evidence from 9,969 IVF cycles in China
Frontiers in endocrinology ·doi:10.3389/fendo.2026.1757107

This study aimed to investigate how levels of serum follicle-stimulating hormone (FSH) on Day 7 of ovarian stimulation are related to the number of oocytes retrieved, and identify any cutoff or threshold point in protocols using gonadotropi…

observational 2022
High initial FSH dosage reduces the number of available cleavage-stage embryos in a GnRH-antagonist protocol: Real-world data of 8,772 IVF cycles from China
Frontiers in endocrinology ·doi:10.3389/fendo.2022.986438

To evaluate the relationship between the initial follicle stimulating hormone (FSH) dose and the number of available cleavage-stage embryos in in vitro fertilization (IVF) cycles.We included 8772 fresh IVF cycles using a GnRH antagonist pro…

rct 2021
Fixed versus flexible antagonist protocol in women with predicted high ovarian response except PCOS: a randomized controlled trial
BMC pregnancy and childbirth ·doi:10.1186/s12884-021-03833-2

BACKGROUND: No previous study directly compares the fixed day-5 initiation versus the flexible initiation of GnRH antagonist administration in IVF/ICSI for those patients who are predicted as high ovarian responders without PCOS. To evaluat…

rct 2009
IVF/ICSI outcomes between cycles with luteal estradiol (E2) pre-treatment before GnRH antagonist protocol and standard long GnRH agonist protocol: a prospective and randomized study
Journal of assisted reproduction and genetics ·doi:10.1007/s10815-009-9300-3

OBJECTIVE: To study if luteal E(2) pre-treatment before GnRH antagonist protocol improves IVF/ICSI outcomes compared with standard long GnRH agonist protocol. DESIGN: A prospective, randomized and controlled study. SETTING: ART center of …