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Fresh embryo transfer

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https://www.readbyqxmd.com/read/28350875/effects-of-embryo-derived-exosomes-on-the-development-of-bovine-cloned-embryos
#1
Pengxiang Qu, Suzhu Qing, Ruiqi Liu, Hongyu Qin, Weiwei Wang, Fang Qiao, Hui Ge, Jun Liu, Yong Zhang, Wei Cui, Yongsheng Wang
The developmental competence of in vitro cultured (IVC) embryos is markedly lower than that of their in vivo counterparts, suggesting the need for optimization of IVC protocols. Embryo culture medium is routinely replaced three days after initial culture in bovine, however, whether this protocol is superior to continuous nonrenewal culture method under current conditions remains unclear. Using bovine somatic cell nuclear transfer (SCNT) embryos as the model, our results showed that compared with routine renewal treatment, nonrenewal culture system significantly improved blastocyst formation, blastocyst quality (increased total cell number, decreased stress and apoptosis, enhanced Oct-4 expression and ratio of ICM/TE), as well as following development to term...
2017: PloS One
https://www.readbyqxmd.com/read/28333696/a-universal-freeze-all-strategy-why-it-is-not-warranted
#2
Baris Ata, Emre Seli
PURPOSE OF REVIEW: There's some preclinical evidence of an adverse effect of multifollicular growth on endometrial function in assisted reproductive technology cycles. Universal elective frozen embryo transfer (eFET) in an unstimulated cycle is being promoted as a panacea, regardless of patient, and cycle characteristics. We review the clinical evidence on the effectiveness and safety of eFETs. RECENT FINDINGS: Randomized controlled trials (RCTs) comparing fresh and eFET yield contradictory results in terms of live birth rates...
March 22, 2017: Current Opinion in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28333033/freeze-all-cycle-in-reproductive-medicine-current-perspectives
#3
Matheus Roque, Marcello Valle, Alessandra Kostolias, Marcos Sampaio, Selmo Geber
The freeze-all strategy has emerged as an alternative to fresh embryo transfer (ET) during in vitro fertilization (IVF) cycles. Although fresh ET is the norm during assisted reproductive therapies (ART), there are many concerns about the possible adverse effects of controlled ovarian stimulation (COS) over the endometrium. The supra-physiologic hormonal levels that occur during a conventional COS are associated with modifications in the peri-implantation endometrium, which may be related to a decrease in pregnancy rates and poorer obstetric and perinatal outcomes when comparing fresh to frozen-thawed embryo transfers...
February 1, 2017: JBRA Assisted Reproduction
https://www.readbyqxmd.com/read/28333028/embryo-stage-of-development-is-not-decisive-for-reproductive-outcomes-in-frozen-thawed-embryo-transfer-cycles
#4
Bruno R de Carvalho, Marina W Paes Barbosa, Helena Bonesi, David B Gomes, Íris O Cabral, Antônio C Paes Barbosa, Adelino A Silva, José R Iglesias, Hitomi M Nakagawa
OBJECTIVE: To evaluate if the outcomes of IVF/ICSI in frozen-thawed embryo transfer and fresh embryo transfer cycles differ in relation to cleavage and blastocyst stages. METHODS: Retrospective cohort study to compare IVF/ICSI outcomes between fresh embryo transfer and frozen-thawed embryo transfer cycles, according to the stage of embryo development. Analysis was carried out on 443 consecutive embryo transfer cycles performed between January 1st and December 31st, 2014...
February 1, 2017: JBRA Assisted Reproduction
https://www.readbyqxmd.com/read/28333025/high-progesterone-levels-in-the-beginning-of-icsi-antagonist-cycles-and-clinical-pregnancy-still-a-concern
#5
Tatiana R Panaino, Joyce B da Silva, Maria Augusta T de Lima, Paloma Lira, Patricia C Arêas, Ana Cristina A Mancebo, Marcelo M de Souza, Roberto A Antunes, Maria do Carmo B de Souza
OBJECTIVE: In controlled ovarian hyperstimulation (COH) using antagonist cycles, an incomplete luteolysis could happen after an inefficient previous luteolysis. Since antagonist cycles are frequent today, this study aims to access the impact of serum progesterone in the beginning and at the end of stimulation, and pregnancy outcomes. METHODS: single-center cohort study, 461 fresh embryo transfers in ICSI antagonist cycles. Serum progesterone levels was measured in the beginning of COH (P4i) and on hCG day (P4f) using threshold values of 1...
February 1, 2017: JBRA Assisted Reproduction
https://www.readbyqxmd.com/read/28333024/optimizing-the-number-of-embryos-to-transfer-on-day-5-two-should-be-the-limit
#6
Claudio Ruhlmann, Lucas Molina, Graciano Tessari, Felicitas Ruhlmann, Lautaro Tessari, Diego Gnocchi, Antonio Cattaneo, Marcela Irigoyen, Alejandro Gustavo Martínez
OBJECTIVE: To define the appropriate number of embryos to be transferred at day 5. METHODS: Retrospective analysis of 784 consecutive fresh day-5 embryo transfers performed between 2007 and 2015, divided in three groups: Group A (N = 219): received the only 2 embryos that reached a transferable stage; Group B (N = 357): received 2 selected embryos among several that reached a transferable stage; Group C (N = 208): received the only 3 developing embryos. Clinical pregnancy, implantation, multiple pregnancy and delivery rates were registered...
February 1, 2017: JBRA Assisted Reproduction
https://www.readbyqxmd.com/read/28329721/how-many-embryos-should-be-transferred-a-validated-score-to-predict-ongoing-implantation-rate
#7
Nicolas Gatimel, Melissa Ladj, Carole Teston, Florence Lesourd, Carole Fajau, Clémentine Cohade, Jean Parinaud, Roger D Léandri
OBJECTIVE: To developed a prognostic score to predict ongoing implantation rate according to clinical and biological parameters and to choose the number of embryos to be transferred in patients undergoing IVF/ICSI. STUDY DESIGN: The transfer score was established using multivariate analysis of biological and clinical parameters in 3211 fresh embryo transfers in a retrospective study. Then we validated the score in 694 fresh embryo transfers in a prospective study...
March 8, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28319018/the-effect-of-elevated-progesterone-levels-before-hcg-triggering-in-modified-natural-cycle-frozen-thawed-embryo-transfer-cycles
#8
Eva R Groenewoud, Nick S Macklon, Ben J Cohlen
Recent studies suggest that elevated late follicular phase progesterone concentrations after ovarian stimulation for IVF may result in embryo-endometrial asynchrony, reducing the chance of successful implantation after fresh embryo transfer. It remains unclear to what extent elevated late follicular phase progesterone levels may occur in unstimulated cycles before frozen-thawed embryo transfer, or what affect they may have on outcomes. In this cohort study, 271 patients randomized to the modified natural cycle arm of a randomized controlled trial comparing two endometrial preparation regimens underwent late follicular phase progesterone and LH testing...
February 28, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28315625/endometrial-injury-for-women-with-previous-in-vitro-fertilization-failure-does-it-improve-pregnancy-rate
#9
Aleksandra Zygula, Iwona Szymusik, Barbara Grzechocinska, Piotr Marianowski, Miroslaw Wielgos
Implantation failure is one of the major factors limiting success of in vitro fertilization (IVF) treatment. According to ESHRE 2009 data only 32% of fresh embryo transfers resulted in clinical pregnancies. There are many ideas to improve the treatment outcomes, endometrial injury being one of them. It has been suggested that local endometrial injury, performed either by pipelle biopsy or hysteroscopy, may increase clinical pregnancy rate. However, up to date literature is widely disparate on that subject. There is no conclusion with regard to optimal timing, the number and technique of the procedure...
November 2016: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/28292612/perinatal-outcomes-in-children-born-after-fresh-or-frozen-embryo-transfer-a-catalan-cohort-study-based-on-14-262-newborns
#10
Mar Vidal, Kilian Vellvé, Mireia González-Comadran, Ana Robles, Maria Prat, Mar Torné, Ramón Carreras, Miguel A Checa
OBJECTIVE: To ascertain whether perinatal outcomes are affected by vitrification and/or controlled ovarian hyperstimulation (COH). DESIGN: Register-based cohort study. SETTING: Not applicable. PATIENT(S): Women undergoing in vitro fertilization (IVF) between 2008 and 2012 using autologous or donated eggs who had a singleton pregnancy delivered from the 24th week onward. INTERVENTION(S): Fresh embryo transfer (ET) or frozen-thawed ET in women undergoing IVF...
March 11, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28288882/clinical-outcomes-of-patients-with-heterotopic-pregnancy-after-surgical-treatment
#11
Yiqi Guan, Caihong Ma
STUDY OBJECTIVE: This study aimed to review surgical management and clinical outcomes of patients with heterotopic pregnancy (HP) who underwent in vitro fertilization and embryo transfer (IVF-ET) and surgical treatment at the Assisted Reproductive Technology Center of Peking University Third Hospital from January 2010 to December 2015. DESIGN: We retrospectively analyzed 56 patients' general characteristics, diagnostic features, surgical management, and clinical outcomes according to medical records and follow-up telephone interviews...
March 10, 2017: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/28277137/the-decline-in-serum-estradiol-on-the-second-day-after-oocyte-retrieval-affects-the-outcome-of-ivf-icsi-et-treatment-in-high-ovarian-responders
#12
Xueyan Bai, Yang Zhang, Shan Liu, Danni Qu, Hui Su, Haiying Ren, Yuan Li
OBJECTIVE: To investigate the predictive value of the decline in serum estradiol on the second day after oocyte retrieval on the outcomes of in vitro fertilization (IVF) or intra-cytoplasmic sperm injection and embryo transfer (ICSI-ET) among high ovarian responders. DESIGN: Retrospective single-center cohort study. SETTING: Tertiary-care, university-affiliated teaching hospital. Patients Women aged 20-45 years undergoing assisted reproduction treatment from June 2014 to December 2015...
February 21, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28277115/does-premature-elevated-progesterone-on-the-day-of-trigger-increase-spontaneous-abortion-rates-in-fresh-and-subsequent-frozen-embryo-transfers
#13
Mae Healy, George Patounakis, Austin Zanelotti, Kate Devine, Alan DeCherney, Michael Levy, Micah J Hill
Recent evidence has shown elevated progesterone (P) advances the endometrium in fresh ART cycles, creating asynchrony with the embryo and thus implantation failure and decreased live birth rates. If the window of implantation is closing as the embryo attempts to implant, there may be difficulty with trophoblastic invasion, leading to failure of early pregnancies. Our objective was to evaluate if P on the day of trigger was associated with spontaneous abortion (SAB) rates in fresh ART transfers. This was a retrospective cohort study involving fresh autologous and FET cycles from 2011 to 2013...
March 2, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28246394/somatic-embryogenesis-of-immature-cunninghamia-lanceolata-lamb-hook-zygotic-embryos
#14
Ruiyang Hu, Yuhan Sun, Bo Wu, Hongjing Duan, Huiquan Zheng, Dehuo Hu, Huazhong Lin, Zaikang Tong, Jinliang Xu, Yun Li
Two efficient somatic embryogenesis systems were developed in Chinese fir, the most important conifer for industrial wood production in China. Three development stages (cleavage polyembryony, dominant embryo, and precotyledon) of immature embryos derived from 25 genotypes of open-pollinated mother trees were used as initial explants. Cleavage polyembryony-stage embryos with a 12.44% induction rate was the most embryogenic response stage. The highest frequency of embryogenic callus (13.86%) induction was obtained from DCR medium supplemented with 1...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28216912/pregnancy-outcomes-and-maternal-and-perinatal-complications-of-pregnancies-following-in-vitro-fertilization-intracytoplasmic-sperm-injection-using-own-oocytes-donor-oocytes-and-vitrified-embryos-a-prospective-follow-up-study
#15
Manish Banker, Vidhisha Mehta, Dipesh Sorathiya, Mira Dave, Sandeep Shah
BACKGROUND: Several global studies have assessed maternal and perinatal outcomes and complications with the type of embryo transfer (ET) following in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI). The present study assessed the incidence of maternal and perinatal outcomes and complications following IVF/ICSI associated with the type of embryo transferred. METHODOLOGY: A total of 2112 ETs were performed in 2092 female patients aged 21-50 years between January 1 and December 31, 2014 (Group A: Fresh ET using self-oocytes: 691; Group B: Fresh ET using donor oocytes: 810; and Group C: Thaw ET using vitrified-warmed embryos: 611)...
October 2016: Journal of Human Reproductive Sciences
https://www.readbyqxmd.com/read/28191261/global-dna-methylation-levels-are-altered-by-modifiable-clinical-manipulations-in-assisted-reproductive-technologies
#16
Jayashri Ghosh, Christos Coutifaris, Carmen Sapienza, Monica Mainigi
BACKGROUND: We analyzed placental DNA methylation levels at repeated sequences (LINE1 elements) and all CCGG sites (the LUMA assay) to study the effect of modifiable clinical or laboratory procedures involved in in vitro fertilization. We included four potential modifiable factors: oxygen tension during embryo culture, fresh embryo transfer vs frozen embryo transfer, intracytoplasmic sperm injection (ICSI) vs conventional insemination or day 3 embryo transfer vs day 5 embryo transfer...
2017: Clinical Epigenetics
https://www.readbyqxmd.com/read/28182605/assisted-reproductive-technology-surveillance-united-states-2014
#17
Saswati Sunderam, Dmitry M Kissin, Sara B Crawford, Suzanne G Folger, Denise J Jamieson, Lee Warner, Wanda D Barfield
PROBLEM/CONDITION: Since the first U.S. infant conceived with assisted reproductive technology (ART) was born in 1981, both the use of ART and the number of fertility clinics providing ART services have increased steadily in the United States. ART includes fertility treatments in which eggs or embryos are handled in the laboratory (i.e., in vitro fertilization [IVF] and related procedures). Women who undergo ART procedures are more likely than women who conceive naturally to deliver multiple-birth infants...
February 10, 2017: MMWR. Surveillance Summaries: Morbidity and Mortality Weekly Report. Surveillance Summaries
https://www.readbyqxmd.com/read/28169189/ovarian-stimulation-protocols-for-ivf-is-more-better-than-less
#18
REVIEW
Michael M Alper, Bart C Fauser
Conventional ovarian stimulation protocols for IVF are designed to achieve maximum oocyte yields. Conventional protocols, however, are associated with patient discomfort, increased risk of ovarian hyperstimulation syndrome and higher costs. In recent years, mild stimulation protocols have risen in popularity. These protocols typically use lower doses (≤150 IU/day), shorter duration of exogenous gonadotrophins, or both, compared with conventional protocols, with the goal of limiting the number of retrieved oocytes to less than eight...
January 24, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28162937/effect-of-progesterone-elevation-in-follicular-phase-of-ivf-cycles-on-the-endometrial-receptivity
#19
REVIEW
B Lawrenz, H M Fatemi
The premature rise of progesterone during the late follicular phase in stimulated IVF cycles is a frequent event, and emerging evidence shows that premature progesterone rise does negatively affect the outcome of assisted reproductive techniques. The effect of elevated peripheral progesterone levels in the late follicular phase seems to be on the endometrium and the window of implantation, which may lead to asynchrony between the endometrium and the developing embryo. In stimulated cycles, endometrial maturation is advanced on the day of oocyte retrieval, and patients with a progesterone level above 1...
January 24, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28139240/optimal-euploid-embryo-transfer-strategy-fresh-versus-frozen-after-preimplantation-genetic-screening-with-next-generation-sequencing-a-randomized-controlled-trial
#20
Alison Coates, Allen Kung, Emily Mounts, John Hesla, Brandon Bankowski, Elizabeth Barbieri, Baris Ata, Jacques Cohen, Santiago Munné
OBJECTIVE: To compare two commonly used protocols (fresh vs. vitrified) used to transfer euploid blastocysts after IVF with preimplantation genetic screening. DESIGN: Randomized controlled trial. SETTING: Private assisted reproduction center. PATIENT(S): A total of 179 patients undergoing IVF treatment using preimplantation genetic screening. INTERVENTION(S): Patients were randomized at the time of hCG administration to either a freeze-all cycle or a fresh day 6 ET during the stimulated cycle...
March 2017: Fertility and Sterility
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