Changjun Zhang

No ORCID on file · 6 papers in corpus
observational 2026
Does the recovery of serum FSH influence the ovarian sensitivity index in the follicular-phase depot GnRH agonist protocol?
BMC pregnancy and childbirth ·doi:10.1186/s12884-026-09246-3

BACKGROUND: The follicular-phase long GnRHa protocol is a common protocol in COH. This study mainly analyzed the recovery of FSH levels on the day of Gn initiation compared with basal FSH levels on the day of downregulation and studied the …

other 2025
Serum concentrations of medroxyprogesterone acetate were undetectable on OPU+5 days and had no effect on the serum progesterone level in patients undergoing the progestin-primed ovarian stimulation protocol
Frontiers in endocrinology ·doi:10.3389/fendo.2025.1490839

OBJECTIVE: To evaluate the dynamics of serum medroxyprogesterone acetate (MPA) concentrations and their influence on serum progesterone (P) levels and pregnancy outcomes in the progestin-primed ovarian stimulation (PPOS) protocol. A total o…

observational 2025
The study on the clinical efficacy of endometrial receptivity analysis and influence factors of displaced window of implantation
Scientific reports ·doi:10.1038/s41598-025-91745-y

The endometrial receptive status is critical for a successful embryo implantation, but it only last for a short period of time, and the window of implantation (WOI) of each woman changes individually, which will lead to poor outcomes of ass…

observational 2023
The comparison between fixed versus degressive doses of medroxyprogesterone acetate combined with letrozole in patients of progestin-primed ovarian stimulation protocol: a propensity score-matched study
Frontiers in endocrinology ·doi:10.3389/fendo.2023.1295787

OBJECTIVE: To explore the cycle characteristics and pregnancy outcomes of progestin-primed ovarian stimulation (PPOS) using fixed versus degressive doses of medroxyprogesterone acetate (MPA) in conjunction with letrozole (LE) in infertile w…

observational 2023
The serum oestradiol/progesterone ratio on the day of OPU + 7, but not the day of OPU + 5, affects the rates of live birth in fresh blastocyst embryo transfer cycles
Journal of ovarian research ·doi:10.1186/s13048-023-01096-3

BACKGROUND: In an in vitro fertilization (IVF) cycle, the embryo ends its wandering time and begins the process of implantation into the uterine cavity on the seventh day after oocyte pick-up (OPU + 7), which is closer than OPU + 5 to the t…

observational 2022
The follicular-phase depot GnRH agonist protocol results in a higher live birth rate without discernible differences in luteal function and child health versus the daily mid-luteal GnRH agonist protocol: a single-centre, retrospective, propensity score matched cohort study
Reproductive biology and endocrinology : RB&E ·doi:10.1186/s12958-022-01014-0

BACKGROUND: The gonadotropin-releasing hormone agonist (GnRH-a) has been used in in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) cycles for a long time. This paper evaluates the efficacy and safety of two commonly used pr…