Catalogue Search | MBRL
Are you sure you want to remove the book from the shelf?
{{itemTitle}}
2,684
result(s) for
"Human embryo Transplantation."
Sort by:
Assisted reproductive technologies in the third phase
Following the birth of the first \"test-tube baby\" in 1978, Assisted Reproductive Technologies became available to a small number of people in high-income countries able to afford the cost of private treatment, a period seen as the \"First Phase\" of ARTs. In the \"Second Phase,\" these treatments became increasingly available to cosmopolitan global elites. Today, this picture is changing - albeit slowly and unevenly - as ARTs are becoming more widely available. While, for many, accessing infertility treatments remains a dream, these are beginning to be viewed as a standard part of reproductive healthcare and family planning. This volume highlights this \"Third Phase\" - the opening up of ARTs to new constituencies in terms of ethnicity, geography, education, and class.
eBook
Single Embryo Transfer
Multiple pregnancies are the most frequent and serious complication of assisted reproduction. Both high-order multiple and twin pregnancies entail a number of medical and economic outcomes that affect the children, the mother, the parents, the families, and society as a whole. Limiting the number of embryos to transfer is the only method available to decrease the incidence of multiple pregnancies. Single Embryo Transfer reviews the advantages and limitations of this approach to assisted reproduction. The crucial issue of selecting the best embryo will be reviewed in detail. All clinical issues involved in setting up and running an SET programme will be covered, including important topics such as cryopreservation of embryos, embryo donation, and patient counselling. The final chapters on future SET trends in Europe and North America are written by leading figures in the IVF world. The book is of interest to physicians, embryologists, nurses, insurers, politicians, ethicists and patients.
eBook
Assisting reproduction, testing genes
Following the routinization of assisted reproduction in the industrialized world, technologies such as in vitro fertilization, preimplantation genetic diagnosis, and DNA-based paternity testing have traveled globally and are now being offered to couples in numerous non-Western countries. This volume explores the application and impact of these advanced reproductive and genetic technologies in societies across the globe. By highlighting both the cross-cultural similarities and diverse meanings that technologies may assume as they enter multiple contexts, the book aims to foster understanding of both the technologies and the settings. Enhanced by cross-cultural perspectives, the book addresses the challenges that globalization presents to local understandings of science, technology, and medicine.
eBook
Impact of elective frozen vs. fresh embryo transfer strategies on cumulative live birth: Do deleterious effects still exist in normal & hyper responders?
Is freeze-all strategy effective in terms of cumulative live birth rates (CLBRs) in all patients? This retrospective single-center study analyzed the CLBRs of 2523 patients undergoing fresh or electively frozen blastocyst transfer cycles. In 1047, cycles, the fresh embryo transfer (ET) strategy was applied for the 1.sup.st ET, whereas electively frozen ET (e-FET) was performed in 1476 cycles. Female age [less than or equal to] 37 and blastocysts frozen via vitrification were included. The patients in each arm were further stratified into four subgroups according to the number of oocytes retrieved as follows: Group A: 1-5, group B: 6-10, group C: 11-15 and group D: 16-25 oocytes retrieved. The primary endpoint was the CLBR. The secondary endpoints were the ovarian hyperstimulation syndrome (OHSS) rate and the live birth rates (LBRs) following fresh ETs and e-FETs for the first transfers. The CLBR was similar between the fresh ET and e-FET arms in group A (35/76 (46.1%) vs 29/67 (43.3%), p = 0.74) and group B (165/275 (60%) vs 216/324 (66.7%), p = 0.091), whereas significantly higher rates were detected in favor of the e-FET arm within group C (328/460 (71.3%) vs 201/348 (57.8%), p<0.001) and group D (227/348 (65.2%), vs 446/625 (71.5%), p<0.001). The OHSS rate was also found to be higher in the fresh ET arm among group C (12/348 (3.4%) vs 0/460 (0%), p<0.001) and group D (38/348 (10.9%) vs 3/625 (0.5%), p<0.001) patients than e-FET arm. Perinatal and obstetrical outcomes were nonsignificantly different between fresh and e-FET arms. However, the birth weights were significantly lower for fresh ET, 3064 versus 3201 g for singletons (p<0.001) Compared with a fresh-transfer strategy, the e-FET strategy resulted in a higher CLBR among patients with >10 oocytes retrieved during stimulated cycles.
Journal Article
Embryo donation: Survey of in-vitro fertilization
This study surveyed patients with stored frozen embryos and developed and tested an intervention through a randomized trial to support subjects to consider embryo disposition options (EDOs), especially donation for family building. Based on a review of literature on EDOs, the authors developed and mailed a 2-page anonymous survey to 1,053 patients in Massachusetts (USA) to elicit their feelings about their stored embryos. Target patients had embryos cryopreserved for [greater than or equal to]1 year and had not indicated an EDO. Survey respondents were next randomized between usual care (control arm) or an offer of complimentary counseling and educational support regarding EDOs. These counseling sessions were conducted by a licensed mental health professional specializing in infertility treatment. Despite telephone reminders, only 21.3% of patients responded, likely reflecting most patients' reluctance to address EDOs. Respondents endorsed an average of 2 of the 5 EDOs, with the following percentages supporting each option: store for future attempts (82%), continue storage (79%), donate to research (29%), discard (14%), and donate for family building (13%). When asked their opinions towards embryo donation to another couple, 78% of patients agreed that donation is a way to help another couple, 48% would consider embryo donation to another family if they had a better understanding of the process, and 38% would be willing to consider donation if they were not going to use the embryos themselves, but 73% expressed discomfort with donation. In the randomized trial, 7.8% of intervention subjects (n = 8) obtained counseling sessions compared to 0.0% (none) of usual care subjects (p = 0.0069). Counseling participants valued not only discussing EDOs, but also assistance in expressing their feelings and differences with their partners. Improvement in counseling rates over the control arm suggests that free professional counseling is a small, but likely effective, step towards deciding on an EDO.
Journal Article
Embryo donation: Survey of in-vitro fertilization (IVF) patients and randomized trial of complimentary counseling
This study surveyed patients with stored frozen embryos and developed and tested an intervention through a randomized trial to support subjects to consider embryo disposition options (EDOs), especially donation for family building.
Based on a review of literature on EDOs, the authors developed and mailed a 2-page anonymous survey to 1,053 patients in Massachusetts (USA) to elicit their feelings about their stored embryos. Target patients had embryos cryopreserved for ≥1 year and had not indicated an EDO. Survey respondents were next randomized between usual care (control arm) or an offer of complimentary counseling and educational support regarding EDOs. These counseling sessions were conducted by a licensed mental health professional specializing in infertility treatment.
Despite telephone reminders, only 21.3% of patients responded, likely reflecting most patients' reluctance to address EDOs. Respondents endorsed an average of 2 of the 5 EDOs, with the following percentages supporting each option: store for future attempts (82%), continue storage (79%), donate to research (29%), discard (14%), and donate for family building (13%). When asked their opinions towards embryo donation to another couple, 78% of patients agreed that donation is a way to help another couple, 48% would consider embryo donation to another family if they had a better understanding of the process, and 38% would be willing to consider donation if they were not going to use the embryos themselves, but 73% expressed discomfort with donation. In the randomized trial, 7.8% of intervention subjects (n = 8) obtained counseling sessions compared to 0.0% (none) of usual care subjects (p = 0.0069). Counseling participants valued not only discussing EDOs, but also assistance in expressing their feelings and differences with their partners.
Improvement in counseling rates over the control arm suggests that free professional counseling is a small, but likely effective, step towards deciding on an EDO. ClinicalTrials.gov Identifier: NCT01883934 (Frozen embryo donation study).
Journal Article
Developmental potential of surplus morulas with delayed and/or incomplete compaction after freezing-thawing procedures
Background
Morulas with delayed growth sometimes coexist with blastocysts. There is still limited evidence regarding the optimal disposal of surplus morulas. With the advancement of vitrification, the freezing-thawing technique has been widely applied to zygotes with 2 pronuclei, as well as embryos at the cleavage and blastocyst stages. The freezing of morulas, however, has rarely been discussed. The purpose of this study was to investigate whether these poor-quality and slow-growing morulas are worthy of cryopreservation.
Methods
This is a retrospective, observational, proof-of-concept study. A total of 1033 day 5/6 surplus morulas were cryopreserved from January 2015 to December 2018. The study included 167 women undergoing 180 frozen embryo transfer cycles. After the morulas underwent freezing-thawing procedures, their development was monitored for an additional day. The primary outcome was the blastocyst formation rate. Secondary outcomes were clinical pregnancy rate, live birth rate and abortion rate.
Results
A total of 347 surplus morulas were thawed. All studied morulas showed delayed compaction (day 5,
n
= 329; day 6,
n
= 18) and were graded as having low (M1,
n
= 54), medium (M2,
n
= 138) or high (M3,
n
= 155) fragmentation. The post-thaw survival rate was 79.3%. After 1 day in extended culture, the blastocyst formation rate was 66.6%, and the top-quality blastocyst formation rate was 23.6%. The day 5 morulas graded as M1, M2, and M3 had blastocyst formation rates of 88.9, 74.0, and 52.8% (
p
< 0.001), respectively, and the top-quality blastocyst formation rates were 64.8, 25.2, and 9.0% (
p
< 0.001), respectively. The clinical pregnancy rate was 33.6%.
Conclusions
The post-thaw blastocyst formation rate was satisfactory, with approximately one-half of heavily fragmented morulas (M3) developing into blastocysts. Most of the poor-quality morulas were worth to freeze, with the reasonable goal of obtaining pregnancy and live birth. This alternative strategy may be a feasible approach for coping with poor-quality surplus morulas in non-PGS (preimplantation genetic screening) cycles.
Journal Article
Pregnancy and perinatal outcomes in pregnancies resulting from time interval between a freeze-all cycle and a subsequent frozen-thawed single blastocyst transfer
Background
Adverse obstetric outcomes are correlated with altered circulating hormone levels at the time implantation by the trophectoderm. What’ more, embryo freezing process may also have adverse effect on perinatal outcomes. This study aims to evaluate whether increasing interval time between a freeze-all cycle and a subsequent frozen-thawed single blastocyst transfer could have any effect on pregnancy and perinatal outcomes.
Methods
This was a retrospective cohort study included the first single blastocyst transfer in artificially cycles of all patients who underwent a freeze-all cycle between January 1
st
, 2016 and September 30
th
, 2018. All patients were divided into two groups according to the time interval between oocyte retrieval and the day of first frozen-thawed embryo transferred (FET): Group 1 (immediate FET cycles) and Group 2 (delayed FET cycles).
Results
No significant differences were reported between the two groups regarding the rates of clinical pregnancy, live birth, biochemical pregnancy and pregnancy loss even after adjusting for measured confounding. When accounting for perinatal outcomes, gestational age, birth weight, delivery mode, fetus gender, preterm birth, gestational hypertension, GDM, placenta previa, fetal malformation and low birthweight also did not vary significantly between the two groups. Only the incidence of macrosomia was more frequently in the Group 2 compared with the Group 1 (AOR 3.886, 95%CI 1.153–13.103,
P
= 0.029) after adjusting with a multiple logistic regression model.
Conclusions
We found delayed FET cycles for blastocyst transfer following freeze-all cycles may not improve the pregnancy outcomes. On the contrary, postponement of FET cycles may increase the risk of macrosomia. Therefore, FET cycles for blastocyst transfer should be done immediately to avoid adverse effects of delayed time on perinatal outcomes.
Journal Article
Continuous endometrial volumetric analysis for endometrial receptivity assessment on assisted reproductive technology cycles
Background
Human implantation is a complex process requiring synchrony between a healthy embryo and a functionally competent or receptive endometrium. In order to assess endometrial receptivity in Assisted Reproductive Technology (ART) cycles serial evaluation of endometrial volumetric analysis may have a predictive value on a positive outcome.
Methods
Serial 3D transvaginal ultrasound performed in women on ART cycle to evaluate embryo implantation predictors. Prospective case control study of 169 subjects were assessed. Endometrial pattern, thickness, volume and adjusted endometrial volume (ratio between endometrial volume and uterine volume) was performed to all subjects on a continuous process from baseline, during controlled ovarian stimulation, trigger day with human chorionic gonadotropin hormone (hCG) and at embryo transfer day.
Results
Demographics and ART procedures and scores, was similar between the two groups. Endometrial morphology also showed no difference between the two groups. Endometrial volume and adjusted endometrial volume was significantly higher in the positive group as soon as day 6 of ovarian controlled stimulation.
Conclusions
Serial 3D endometrial volume and adjusted endometrial volumes provides a predicting clinical tool enhancing elective embryo transfers in fresh ART cycle. Thus providing a non-invasive continuous technique for endometrial receptivity assessment that reflects endometrial changes during ART procedures.
Journal Article