Abstract：
:Improved laboratory standards and better culture media have made extended culture to blastocyst stage a reality to identify embryos with maximum implantation potential. The strategy of extended culture has become more popular across the world at a time when regulatory bodies have emphasized the need to increase the uptake of elective single embryo transfer, minimize complications associated with multiple births and aim for a healthy singleton live-birth as the preferred outcome in IVF. New data on perinatal outcomes suggest that pregnancies after embryo transfer at blastocyst stage are associated with a higher risk of preterm delivery, large for gestational age babies, monozygotic twins and altered sex ratio compared with those following embryo transfers at cleavage stage. In addition, concerns have been raised of increased congenital anomalies and epigenetic modifications with embryo transfer at blastocyst stage. Twenty-four years on from the first embryo transfer at blastocyst stage, we examine the reasons for extended embryo culture, evaluate the risks and benefits of this strategy and suggest the need to reconsider this policy in the interests of fetal safety.
journal_name
Reprod Biomed Onlinejournal_title
Reproductive biomedicine onlineauthors
Maheshwari A,Hamilton M,Bhattacharya Sdoi
10.1016/j.rbmo.2015.09.016subject
Has Abstractpub_date
2016-02-01 00:00:00pages
142-6issue
2eissn
1472-6483issn
1472-6491pii
S1472-6483(15)00488-5journal_volume
32pub_type
杂志文章abstract：:In this prospective randomized study, women with idiopathic karyotypically normal premature ovarian failure (POF) were treated with gonadotrophin-releasing hormone (GnRH) agonist and gonadotrophins with and without the addition of corticosteroids in an attempt to restore ovarian function. The study comprised 58 women ...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,随机对照试验
doi：10.1016/s1472-6483(10)60711-0
更新日期：2007-08-01 00:00:00
abstract：:Caesarean scar pregnancy is a dangerous condition that occurs when an embryo is implanted in a previous Caesarean scar. This condition has become more frequent as a direct consequence of the increased number of Caesarean sections reported worldwide. Timely diagnosis of this condition is fundamental, and allows a conse...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,评审
doi：10.1016/j.rbmo.2014.06.017
更新日期：2014-11-01 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：:The aim of this review will be to provide a basic understanding of the biophysical processes that accompany the application of cryopreservation in reproductive medicine. The ability to store cells in 'suspended animation' outside the body has become a keystone practice in the development of many modern clinical therap...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,评审
doi：10.1016/s1472-6483(10)61780-4
更新日期：2004-12-01 00:00:00
abstract：RESEARCH QUESTION:Can single-nucleotide polymorphisms (SNP) of genes related to progesterone synthesis predict the risk of premature serum progesterone elevation in women undergoing gonadotrophin-releasing hormone agonist protocols for ovarian stimulation? DESIGN:A total of 765 women were divided into high progesteron...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2019.12.013
更新日期：2020-03-01 00:00:00
abstract：:The aim of this retrospective study was to determine whether pituitary down-regulation after gonadotrophin-releasing hormone analogue (GnRHa) administration can be accurately predicted by transvaginal ultrasonographic measurement of endometrial thickness in the presence of menstruation. All cycles of an IVF/intracytop...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61109-1
更新日期：2004-05-01 00:00:00
abstract：:Oxygen derivatives that comprise the large family of reactive oxygen species (ROS) are actively involved in placental biology. They are generated at the maternal-fetal interface at the level of decidual, trophoblast and mesenchymal components. In normal conditions, ROS produced in low concentrations participate in dif...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,评审
doi：10.1016/j.rbmo.2012.03.016
更新日期：2012-07-01 00:00:00
abstract：:The aim of this prospective, randomized clinical trial (RCT) was to evaluate whether the supplemental protein concentration in embryo transfer (ET) medium affects the clinical outcomes in IVF-ET. A total of 750 patients undergoing IVF-ET who met the inclusion criteria were randomly divided into three groups, according...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.rbmo.2015.10.004
更新日期：2016-01-01 00:00:00
abstract：:Older women comprise an increasing portion of patients entering assisted reproduction programmes. This study is a retrospective summary of the files of all patients aged 40 years and older at advent of IVF, between 1995 and 2004, in the authors' centre. In all, 381 women underwent 1217 initiated treatment cycles. Embr...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)60878-4
更新日期：2007-03-01 00:00:00
abstract：:The aim of the current study was to examine the effects of granulocyte-macrophage colony-stimulating factor (GM-CSF) on the development and differentiation of preimplantation mouse embryos from different strains and under different culture conditions. Embryos from F1 hybrid mice were cultured in a modified G1 medium l...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)60829-2
更新日期：2005-04-01 00:00:00
abstract：:In male infertility, complementary treatment with antioxidant-containing food supplements quadruples the spontaneous pregnancy rate and reduces the cost per pregnancy by 60%. ...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2011.05.009
更新日期：2011-09-01 00:00:00
abstract：RESEARCH QUESTION:Is a mixture of preconception serum lipids and lipophilic micronutrients associated with clinical pregnancy and live births? DESIGN:In this prospective cohort study, blood serum was collected on the day of oocyte retrieval for 180 women undergoing IVF at an academic reproductive health centre. Concen...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2019.06.004
更新日期：2019-10-01 00:00:00
abstract：:The fact that today it is possible to write a comprehensive report on assisted reproduction technologies in Latin America is the result of a serious and systematic effort, accomplished by more than 80 centres, from Mexico to Chile. Over the past 10 years, these centres representing the vast majority of assisted reprod...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)62237-7
更新日期：2001-01-01 00:00:00
abstract：:The non-classical major histocompatibility complex (MHC) class Ib antigens, termed HLA-G and HLA-E, have been associated with fetal maternal tolerance. The role of HLA-G in the preimplantation embryo remains unclear although immunoprotection, adhesion and cell signalling mechanisms have been suggested. Unlike HLA-G, H...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2009.11.008
更新日期：2010-02-01 00:00:00
abstract：:The aim of this study was to investigate the regulation of anti-Müllerian hormone (AMH) blood concentrations in mother and fetus during pregnancy. Serum concentrations of AMH, gonadotrophins, oestradiol and progesterone were measured in pregnant women in the first trimester and AMH concentrations in second-trimester f...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)60016-8
更新日期：2009-05-01 00:00:00
abstract：:While the role of inherited thrombophilia has been accepted as a cause of recurrent late pregnancy complications, the contribution of mutated thrombophilic genes to implantation failure has not been studied. Proteins involved in fibrinolysis are necessary for trophoblast invasion into the endometrium. This study compa...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61004-8
更新日期：2006-03-01 00:00:00
abstract：:To assess the impact of endometriosis on obstetric outcomes and to determine whether the severity, location and surgical treatment of the disease before the pregnancy had an impact on the prevalence of these disorders, a monocentric, case-control study was performed. In total, 113 pregnancies obtained by assisted repr...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2016.03.005
更新日期：2016-06-01 00:00:00
abstract：RESEARCH QUESTION:There is some controversy regarding the impact of ovarian stimulation on immune cells in women undergoing IVF. The study's aim was to determine whether ovarian stimulation affected immune uterine cells in healthy women undergoing IVF. DESIGN:This prospective cohort study included 28 patients undergoi...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2019.08.004
更新日期：2020-01-01 00:00:00
abstract：:Present management of the ovarian endometrioma focuses on the size of the cyst and dictates that surgery should not be performed unless this exceeds 3 cm, which neglects the complex pathology of this condition. Studies of ovaries with the endometrioma in situ show progressive smooth muscle cell metaplasia and fibrosis...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2013.09.024
更新日期：2014-02-01 00:00:00
abstract：:Time-lapse technique provides opportunities to observe the dynamic process of human early development. Previous studies have suggested several abnormal division patterns were associated with decreased developmental potential, but no systematic results are currently available. In this study, seven abnormal division pat...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2015.02.008
更新日期：2015-06-01 00:00:00
abstract：:Participation in external quality control (EQC) programmes is recommended by various scientific societies. Results from an EQC programme for embryology laboratories are presented. This 5-year programme consisted of the annual delivery of (i) materials to test toxicity and (ii) a DVD/CD-ROM with images of zygotes and e...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2009.09.033
更新日期：2010-01-01 00:00:00
abstract：RESEARCH QUESTION:Can serum oestradiol concentrations on the day of progesterone initiation predict live birth rates in single, autologous vitrified-warmed blastocyst transfers following artificial endometrial preparation? DESIGN:This retrospective study included the first transfers of 468 patients with unexplained or...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2019.08.009
更新日期：2019-12-01 00:00:00
abstract：RESEARCH QUESTION:Does music therapy help in reducing pain and anxiety in women undergoing transvaginal ultrasound-guided oocyte retrieval (TUGOR)? DESIGN:In this randomized controlled open label study, 209 participants were recruited and randomized into three groups (music group, n = 70; headphone group, n = 70; cont...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.rbmo.2018.04.049
更新日期：2018-08-01 00:00:00
abstract：:The study aimed to examine: (i) the association between perception of infertility controllability and coping strategies; and (ii) the association between perception of infertility controllability and coping strategies to psychological distress, applying multivariate statistical techniques to control for the effects of...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2012.03.002
更新日期：2012-06-01 00:00:00
abstract：:Since the development of assisted reproduction techniques most countries have witnessed increased rates of multiple pregnancy. Despite the guidelines proposed by various scientific societies these rates continue to be abnormally high. In Spain, as in other Mediterranean countries, a greater number of embryos are trans...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,评审
doi：10.1016/s1472-6483(10)61035-8
更新日期：2006-12-01 00:00:00
abstract：RESEARCH QUESTION:Does ovarian stimulation for oocyte vitrification affect disease-free survival and overall survival rates in women with early breast cancer? DESIGN:This cohort study included 259 patients with early breast cancer; 148 patients underwent ovarian stimulation, whereas 111 patients did not. Patients were...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/j.rbmo.2019.07.003
更新日期：2019-11-01 00:00:00
abstract：:In their quest for a child, infertile couples embark on a journey that is full of expectations and hopes. Over recent years, treatment procedures for assisted conception have become safer and more efficient. However, couples undergoing treatment can still experience some degree of emotional stress due to disappointmen...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,评审
doi：10.1016/s1472-6483(10)61078-4
更新日期：2006-06-01 00:00:00
abstract：:Bacterial culture of semen samples from 100 male partners in infertile couples revealed the presence of aerobic bacteria in 49 cases. Streptococcus faecalis (Enterococcus) was isolated from 53%, micrococci species from 20% and alpha-haemolytic streptococci from 16% of the infected samples. The incidence of oligozoospe...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章
doi：10.1016/s1472-6483(10)61591-x
更新日期：2002-07-01 00:00:00
abstract：:Due to inherent differences between gonadotrophin-releasing hormone (GnRH) antagonists and agonists, their late effect on ovarian steroidal production during the luteal phase of IVF cycles may differ. The aim of this study was to characterize and compare the luteal phase hormonal profile after the use of GnRH antagoni...
journal_title：Reproductive biomedicine online
pub_type： 杂志文章,随机对照试验
doi：10.1016/s1472-6483(10)60976-5
更新日期：2006-01-01 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
