Lei Yan

BACKGROUND: Assisted reproductive treatment for women with endometriosis and diminished ovarian reserve (DOR) is challenging, and the optimal controlled ovarian stimulation (COS) protocol for this population remains uncertain. This study co…

PURPOSE: This study aimed to develop international expert consensus statements on chronic endometritis (CE) through a comprehensive literature review of existing evidence and a modified Delphi approach. METHODS: Ten panelists of the Japan …

Endometriosis affects approximately 10% of women of reproductive age worldwide. Although elemental components of refluxed menstrual blood have been implicated in disease progression, comprehensive ionomic profiling of the endometriotic micr…

Endometriosis (EM) is driven by immune dysregulation and macrophage dysfunction, yet the underlying mechanisms remain unclear. Here, metabolomic profiling revealed excessive itaconate accumulation in EM lesions, primarily due to elevated ci…

OBJECTIVE: To investigate the incidence of postoperative venous thromboembolism in women with uterine adenomyosis treated using different surgical methods, and to evaluate the associated clinical and laboratory parameters, including thrombo…

The periconception period is critical for embryo development, pregnancy outcomes, and offspring health. During this stage, oviductal and uterine fluids facilitate embryo-maternal interactions and support early embryonic development. Using P…

IN BRIEF: Abnormal glucose metabolism may be involved in the pathogenesis of endometriosis. The present study identifies that highly expressed H19 leads to increased aerobic glycolysis and histone lactylation levels in endometriosis. ABSTR…

Routine histopathological examination of hernia sac in adults remains a controversial topic. We undertook a retrospective study to assess possible clinical benefits of pathological examination of hernia sac specimens. Our pathology database…

Endometriosis is a chronic disease associated with a disrupted oxidative balance and chronic inflammation. In this study, we investigated the role of glutathione S-transferase Mu class 4 (GSTM4) in endometriosis and determined whether 6-(7-…

The cumulative live birth rate (CLBR) can better reflect the overall treatment effect by successive treatments, and continuous rather than categorical variables as exposure variables can increase the statistical power in detecting the poten…

Controversial conclusions have been made in previous studies regarding the influence of ultra-long gonadotropin-releasing hormone agonist (GnRH-a) in the reproductive outcomes of women with endometriosis who are undergoing in vitro fertiliz…

BACKGROUND: Surgery in elder patients with intermural fibroids delays pregnancy, and GnRH-a can shrink uterine fibroids to a certain extent; therefore, for geriatric patients with fibroids, determining whether GnRH-a pretreatment before fro…

Introduction: This study aimed to compare the pregnancy outcomes of different endometrial preparation protocols in patients with adenomyosis and thin endometrium during frozen embryo transfer. Methods: The study, which was conducted at the …

PURPOSE: The reproductive outcomes of patients with endometriosis who are infertile have attracted recent attention. We aimed to explore whether endometriosis affects endometrial receptivity by observing pregnancy outcomes following a euplo…

Low-dose aspirin is widely used during frozen-embryo transfer (FET) cycles. Its anti-platelet property makes it a potentially useful drug for the prevention of hypertension disorders of pregnancy (HDP). However, the existing evidence about …

The influence of endometrioma on oocyte and embryo competence is inconclusive. Furthermore, the benefits of surgical treatment remain uncertain. This study aimed to investigate the effect of endometrioma on oocyte and embryo quality from a …

OBJECTIVE: To assess the effect of uterine septum resection on reproductive outcomes of in vitro fertilization (IVF) / intracytoplasmic sperm injection (ICSI) in patients with secondary infertility complicated with uterine septum. METHODS:…

Aims: The primary aim of the current study was to elucidate the function of the stimulator of interferon genes (STING) in the eutopic endometrium of women with endometriosis. Materials and Methods: STING expression and signaling pathways we…

RESEARCH QUESTION: Is the singleton live birth rate superior for vitrified-warmed versus fresh embryo transfer in women with adenomyosis? DESIGN: This cohort study retrospectively analysed data from the Reproductive Hospital Affiliated to …

During controlled ovarian hyperstimulation (COH), cystic anechoic zones in the uterine cavity are occasionally visible. This retrospective matched cohort study collected information on patients who underwent in vitro fertilization/intracyto…

PURPOSE: The purpose of the study was whether endometriosis influences IVF/ICSI and subsequent pregnancy and obstetric outcomes. METHODS: Searches were performed on PubMed, EMBASE, Medline, and Web of Science. Most of the included studies …

OBJECTIVE: To evaluate the effect of newly non-uniform endometrial echogenicity diagnosed by transvaginal ultrasound on the outcome of pregnancy in vitro fertilization-embryo transfer (IVF-ET) during controlled ovarian hyperstimulation (COH…