Abstract：
RESEARCH QUESTION:Previous studies of aromatase inhibitors on male infertility have focused on men with low testosterone-oestradiol ratio of less than 10. Can aromatase inhibitors improve spermatogenesis in men with idiopathic male infertility with normal testosterone-oestradiol ratio? DESIGN:Prospective study of men with idiopathic severe oligozoospermia (sperm concentration <5 million/ml) carried out between February 2015 and March 2017. The objective was to assess if semen-analysis parameters improved after treatment with letrozole. Secondary objectives were to monitor the safety of letrozole in men, and to measure the alterations in serum FSH, LH, oestradiol and testosterone levels. RESULTS:Fifteen men with normal testosterone-oestradiol ratio (>10) were treated with letrozole 2.5 mg daily for 4 months. This produced a 5.5-fold increase in sperm concentration (P = 0.0068). All men had increased total serum testosterone and suppressed oestradiol levels after treatment, thus raising the overall testosterone-oestradiol ratio (P < 0.0001). Adverse effects from letrozole were relatively minor and included loss of libido (54%), headaches (25%), fatigue (21%), weakness (13%), loss of hair (8%) and dry mouth (8%). CONCLUSIONS:Letrozole improves sperm concentration and increases testosterone-oestradiol ratio for men with oligozoospermia who have normal testosterone-oestradiol ratio; its role in the treatment of male infertility may be extended to this group of patients. In addition, it is a relatively well-tolerated drug with no serious adverse effects.
journal_name
Reprod Biomed Onlinejournal_title
Reproductive biomedicine onlineauthors
Shuling L,Sie Kuei ML,Saffari SE,Jiayun Z,Yeun TT,Leng JPW,Viardot-Foucault V,Nadarajah S,Chan JKY,Hao THdoi
10.1016/j.rbmo.2018.09.016subject
Has Abstractpub_date
2019-01-01 00:00:00pages
39-45issue
1eissn
1472-6483issn
1472-6491pii
S1472-6483(18)30520-0journal_volume
38pub_type
杂志文章abstract：:The aims of this study were to investigate the relationship between inhibins, activin A and follistatin in first trimester fetal fluids, maternal serum, placenta and decidua, and to investigate if these hormones are present in the circulation of the early second trimester human fetus. Amniotic and coelomic fluid, mate...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61653-7
更新日期：2004-06-01 00:00:00
abstract：:Modern contraception is considered to be one the major advances of the 20th century. Yet, as the next century begins, it is estimated that there is still a largely unmet need for contraception, with millions of couples worldwide who express a wish to limit the number of their children but do not use or are not satisfi...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61962-1
更新日期：2001-01-01 00:00:00
abstract：:Traditional dogma suggests that intracytoplasmic sperm injection (ICSI) should be performed to ensure successful oocyte fertilization in an in-vitro maturation (IVM) cycle. This study postulated that there would be no difference in the fertilization rate when ICSI was compared with IVF. This hypothesis was tested in a...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.rbmo.2012.08.001
更新日期：2012-12-01 00:00:00
abstract：:Tubal pathology is a common cause of subfertility. Identifying risk factors for tubal pathology in the medical history is important to distinguish between those couples who benefit from early tubal patency tests and those in whom presence of tubal pathology is less likely and delaying tubal tests is justified. This st...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)60589-5
更新日期：2008-02-01 00:00:00
abstract：:Worldwide, oocyte donors donate voluntarily or receive varying amounts of money for donation. This raises ethical questions regarding the appropriateness of financial compensation, and the possibility of undue inducement and exploitation of oocyte donors. Are these donors capable of making an independent, well-conside...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2017.05.002
更新日期：2017-08-01 00:00:00
abstract：RESEARCH QUESTION:To compare stimulated cycle (STC) versus modified natural cycle (MNC) for endometrial preparation prior to frozen embryo transfer (FET) in terms of convenience and efficacy. DESIGN:Prospective, open-label, randomized controlled study including 119 patients aged 20-38 years, undergoing intra-conjugal ...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2020.01.007
更新日期：2020-04-01 00:00:00
abstract：:The revolutionary development of biotechnology-derived therapeutic proteins has provided the expected improvements in quality, purity and consistency, as demonstrated in recombinant human FSH (rhFSH). However, the development of urine-derived gonadotrophins has not always shown comparable improvements. More recently, ...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)60613-x
更新日期：2006-08-01 00:00:00
abstract：RESEARCH QUESTION:What is the influence of the Caesarean section-pregnancy interval (CSPI) on the risk of uterine rupture, and what are the repercussions on IVF pregnancy rates of prolonging it? STUDY DESIGN:Systematic searches were performed using PubMed MEDLINE to identify studies published up until July 2017 for ar...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2019.07.027
更新日期：2019-11-01 00:00:00
abstract：:This study aimed to investigate whether the spermatozoa-zona pellucida binding test is able to select spermatozoa with higher fertilization potential and higher rate of successful embryo development. This prospective study was performed with metaphase II (MII) oocytes retrieved from couples undergoing intracytoplasmic...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2009.09.020
更新日期：2009-12-01 00:00:00
abstract：:Preimplantation genetic diagnosis (PGD) is usually used to establish a non-affected pregnancy for those couples facing a genetic risk of having an affected child. However, an invasive test is still recommended to all PGD patients due to the risk of misdiagnosis. The discovery of cell-free fetal DNA in maternal plasma ...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2009.09.005
更新日期：2009-11-01 00:00:00
abstract：:This study investigated the effects of long-term (24h) in-vitro sperm incubation at room temperature (RT; 23°C) versus testis temperature (35°C) on various sperm-quality parameters. Semen samples (n=41) were prepared both by density-gradient centrifugation (DGC) and the swim-up technique in order to compare the influe...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2013.12.005
更新日期：2014-04-01 00:00:00
abstract：:Several surgical treatment modalities have been described in cases of isolated or multiple ovarian endometriotic cysts. The aim of this preliminary study was to investigate and test the efficacy of ethanol sclerotherapy (EST) for recurrent endometriotic cysts, before ovarian stimulation in infertile patients with an a...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)60055-7
更新日期：2009-07-01 00:00:00
abstract：:Although numerous methods have been promoted as having an influence on the gender of offspring, most lack credible scientific evidence of effectiveness. Preconception gender selection has an important application in reducing the risk of having children with X-linked disease. A preconception, flow cytometric sperm sort...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)62217-1
更新日期：2005-03-01 00:00:00
abstract：:The association between polycystic ovary syndrome (PCOS) and recurrent miscarriage (RM) has been long established, but the relative importance of this condition as a cause of RM is far from clear. Previous studies on the prevalence of PCOS in RM have been hampered by a lack of objective and universally accepted criter...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2009.06.003
更新日期：2009-10-01 00:00:00
abstract：:This report aimed to examine the effects of atosiban on pregnancy outcome after IVF-embryo transfer. A prospective, randomized, placebo-controlled clinical study was performed. A total of 180 women undergoing intracytoplasmic sperm injection who had top-quality embryos were randomly allocated into treatment and contro...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.rbmo.2010.04.009
更新日期：2010-09-01 00:00:00
abstract：:Reactive oxygen species (ROS) have a negative impact on sperm DNA, leading to the formation of oxidative products such as 8-oxo-7,8-dihydroxyguanosine. This compound causes fragmentation and, thus, has a mutagenic effect. Patient treatment with oral antioxidant vitamins is, therefore, standard practice for male infert...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,多中心研究
doi：10.1016/s1472-6483(10)60887-5
更新日期：2007-04-01 00:00:00
abstract：:Protein kinase B (PKB/Akt), a serine/threonine kinase, regulates the function of many cellular proteins involved in apoptosis and proliferation. It was postulated that there is a higher Akt activity in endometriosis compared with normal endometrium, and that oestrogen may be one of the factors responsible for the high...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2009.10.001
更新日期：2009-12-01 00:00:00
abstract：RESEARCH QUESTION:Endoplasmic reticulum stress (ERS) is caused by the accumulation of the misfolded or unfolded proteins in the endoplasmic reticulum and induces the unfolded protein response (UPR). Peritoneal fluid is important in the pathogenesis of endometriosis. In this study, the role of UPR associated with ERS in...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2020.09.012
更新日期：2021-01-01 00:00:00
abstract：:The anti-oestrogenic activity of clomiphene citrate (CC) on the cervical mucous and endometrium may be the reason for the relatively low pregnancy rates in CC induction cycles. Various follicular-phase supplements have been tried to improve cycle outcome in these patients. This study compared follicular-phase suppleme...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.rbmo.2009.06.007
更新日期：2009-10-01 00:00:00
abstract：:Preimplantation genetic aneuploidy screening performed by polar body biopsy has become a frequently used method, especially as in several countries only preconceptional genetic diagnosis is allowed. To penetrate the zona pellucida, mechanical, chemical and laser-assisted techniques have been introduced. In this paper,...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,评审
doi：10.1016/s1472-6483(10)62023-8
更新日期：2006-07-01 00:00:00
abstract：:Several hypotheses have been advanced to explain empty follicle syndrome (EFS) but it remains a controversial topic. This paper reports experience with three IVF cycles in which no oocytes were collected. In all cases, an additional IVF cycle was performed. The ovarian stimulation protocol, ultrasound and hormonal sur...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61662-8
更新日期：2005-05-01 00:00:00
abstract：:Application of recombinant technology to FSH in the early 1990s produced a highly purified preparation. Calibration of the product was dependent on the rat 'bioassay' based on measurement of ovarian weight after injection of FSH into rats. This test is associated with variability in the measurement of FSH bioactivity ...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(11)60385-4
更新日期：2005-06-01 00:00:00
abstract：:Experience with conventional clinical IVF indicates that a first cleavage can occur in the absence of detectable pronuclear formation (so-called silent fertilization). In these instances, the first division is often asymmetrical and delayed when compared with normally fertilized siblings. In this study, DNA configurat...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)60930-3
更新日期：2004-04-01 00:00:00
abstract：:The effect that gonadotrophin-releasing hormone (GnRH) antagonists exert on endometrial receptivity has not yet been elucidated. GnRH antagonists might directly affect oocytes, the embryo and/or the endometrium. The aim of this study was to investigate the direct effect of GnRH antagonists on the endometrium in oocyte...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,随机对照试验
doi：10.1016/s1472-6483(10)60266-0
更新日期：2009-02-01 00:00:00
abstract：RESEARCH QUESTION:Does anogenital distance (AGD) differ in newborn infants conceived through assisted reproduction technology (ART) compared with those conceived naturally? DESIGN:This case-control study looked at anthropometric and anogenital measurements in 247 male and 200 female newborns born after ART (n = 121) o...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2020.04.019
更新日期：2020-09-01 00:00:00
abstract：:Preimplantation genetic diagnosis (PGD) for chromosomal disorders is currently performed by interphase fluorescence in-situ hybridization (FISH) analysis. This technique is known to have limitations for detecting some translocations and complete karyotyping, so visualization of chromosomes in single cells is required ...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61836-6
更新日期：2002-11-01 00:00:00
abstract：:Ovarian stimulation with low-dose human menopausal gonadotrophin (HMG) is superior to clomiphene citrate in intrauterine insemination (IUI) cycles with respect to clinical pregnancy rate, but it is unclear whether HMG is also the more cost-effective option. The aim of this study was to compare the cost-effectiveness o...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2017.12.007
更新日期：2018-03-01 00:00:00
abstract：:Our understanding of the composition of the microbial communities that inhabit the human body, known as the 'microbiome', is aided by the development of non-culture-dependent DNA sequencing. It is increasingly apparent that the balance of microbial species greatly affects the health of the host. Disturbances in the co...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,评审
doi：10.1016/j.rbmo.2017.04.005
更新日期：2017-07-01 00:00:00
abstract：:Comparative profiling was performed on proteins synthesized in human cumulus cells (CC) from individual oocytes recovered after two different ovarian stimulation protocols for classical IVF (cIVF). Using high-resolution two-dimensional protein electrophoresis after metabolic labelling with [35S]-methionine, protein ex...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61028-0
更新日期：2006-12-01 00:00:00
abstract：:Case reports reveal that clinicians applying preimplantation genetic diagnosis are increasingly confronted with requests by patients which they consider ethically problematic. These requests raise the question to what extent physicians share responsibility for the welfare of the future child. Two categories of situati...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)62068-8
更新日期：2003-11-01 00:00:00
