Jung Ryeol Lee

BACKGROUND: Declining fertility rates are a globally documented problem, affecting even regions that have historically high fertility rates. In the Asia Pacific (APAC) region, most countries and territories are seeing birth rates drop far b…

Background: Effective management of endometriosis necessitates a comprehensive, multidisciplinary approach. Networks or centres of expertise play a pivotal role in enhancing clinical care, fostering collaboration, and promoting innovative r…

This article reports the live birth of a healthy newborn using vitrified-warmed oocytes from fertility preservation before ovarian surgery. The patient in our case underwent two cycles of controlled ovarian stimulation before laparoscopic b…

BACKGROUND: Female infertility is a crucial problem with significant implications for individuals and society. In this study, we explore risk factors for infertility in Korean women. METHODS: A total of 986 female patients who visited six …

Background: Reduced-port robotic myomectomy (RPRM) using Da Vinci® Xi™ is a good fertility-saving surgical option, but the surgical and fertility outcomes are unknown. Methods: This was a retrospective cohort study evaluating the feasibilit…

Background and Aims: Endometriosis is known to have detrimental effects on fertility, but there is no consensus on the optimal stimulation protocol for IVF-ET in patients with endometriosis. The study aimed to compare the IVF outcomes of go…

Background and Aims: Laparoscopic ovarian cystectomy has been the mainstay of surgical methods for endometriosis. Recently, robot-assisted ovarian cystectomy using Da Vinci Ⓡ Xi ™ surgical system has been successfully introduced into clinic…

OBJECTIVE: The aim of this study was to assess the correlation of oocyte number with serum anti-Müllerian hormone (AMH) levels measured by two automated methods (Access or Elecsys) in fresh stimulated in vitro fertilization (IVF) cycles. M…

This study investigated the genetic association between recurrent pregnancy loss (RPL) and microRNA (miRNA) polymorphisms in miR-10aA>T, miR-30cA>G, miR-181aT>C, and miR-499bA>G in Korean women. Blood samples were collected from 381 RPL pat…

PURPOSE: The present study aimed to identify microorganisms in follicular fluids and to investigate their association with in vitro fertilization (IVF) outcomes. MATERIALS AND METHODS: This study was conducted as a prospective study of 49 …

OBJECTIVE: Oocyte (OC), embryo (EC), and ovarian tissue cryopreservation (OTC) are options for fertility preservation (FP) before going through gonadotoxic cancer treatment, or anticipated fertility decline in benign ovarian diseases, or fo…

The purpose of this study was to investigate whether polymorphisms in five microRNAs (miRNAs), miR-604A>G, miR-608C>G, 631I/D, miR-938G>A, and miR-1302-3C>T, are associated with the risk of idiopathic recurrent pregnancy loss (RPL). Blood s…

The levonorgestrel-releasing intrauterine system (LNG-IUS) is a highly effective contraceptive method that has several noncontraceptive benefits. It has been used in various gynecological conditions, such as heavy menstrual bleeding, dysmen…

OBJECTIVE: This study aimed to investigate sperm motility and its changes after preparation as predictors of pregnancy in intrauterine insemination (IUI) cycles. METHODS: In total, 297 IUI cycles from January 2012 to December 2017 at a sin…

Endometrioma is known to reduce the ovarian reserve and the extent of the decrease is more severe when ovarian surgery is performed. Therefore, to prevent this decline in fertility, patients with endometrioma are considered candidates for p…

This corrects the article "Management of endometriosis-related infertility: Considerations and treatment options" in Volume 47 on page 1.

Endometriosis is a common inflammatory disease in women of reproductive age and is one of the major causes of infertility. Endometriosis causes a sustained reduction of ovarian reserve through both physical mechanisms and inflammatory react…

RESEARCH-QUESTION: What is the clinical usefulness of oocyte cryopreservation for fertility preservation in women with ovarian endometriosis? DESIGN: Clinical characteristics were retrospectively analysed in 34 women with endometrioma befo…

This study aimed to analyze the effects of a new protocol with letrozole on the outcomes of in vitro fertilization (IVF) cycles in women with endometriosis. This retrospective cohort study was conducted for women diagnosed with endometriosi…

OBJECTIVE: To investigate the patterns of estradiol-oocyte ratio (EOR) and estradiol-mature oocyte ratio (EMOR) in patients with breast cancer undergoing controlled ovarian stimulation (COS) using letrozole and gonadotropins for fertility p…

OBJECTIVE: Uterine contraction induced by the embryo transfer (ET) process has an adverse effect on embryo implantation. The aim of this study was to determine the effect of oxytocin antagonist supplementation on the day of ET on in vitro f…