Barbara Lawrenz
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View article: How to enhance prediction of clinical outcomes in poor responders: integrating high-specific assays for anti-mullerian hormone with antral follicle count
How to enhance prediction of clinical outcomes in poor responders: integrating high-specific assays for anti-mullerian hormone with antral follicle count Open
Introduction Anti-Müllerian Hormone (AMH) and antral follicle count (AFC) are commonly used markers of ovarian reserve, yet their predictive accuracy in patients with low ovarian reserve remains limited. This study aimed to evaluate whethe…
View article: Gonadotropin-releasing Hormone Antagonist versus Fixed Progestin-Primed Ovarian Stimulation in In vitro Fertilisation: A Cohort Study
Gonadotropin-releasing Hormone Antagonist versus Fixed Progestin-Primed Ovarian Stimulation in In vitro Fertilisation: A Cohort Study Open
Background: Investigators have compared progestin-primed ovarian stimulation (PPOS) and conventional stimulations in multiple studies, however, with contrasting observations with respect to in vitro fertilisation (IVF) cycle outcomes. The …
View article: O-245 Follicle size at the time of trigger and oocyte maturation: does one size fit for all ovarian stimulation protocols?
O-245 Follicle size at the time of trigger and oocyte maturation: does one size fit for all ovarian stimulation protocols? Open
Study question Do different ovarian stimulation protocols require a different range of follicle size distribution at final oocyte maturation to maximize maturation rate? Summary answer Regardless of the stimulation protocol, the highest ma…
View article: O-257 Luteal phase stimulation for IVF/ICSI has no effect on the yield of euploid embryos in PGT-A cycles when compared to follicular phase stimulation
O-257 Luteal phase stimulation for IVF/ICSI has no effect on the yield of euploid embryos in PGT-A cycles when compared to follicular phase stimulation Open
Study question Do luteal phase stimulations have a detrimental influence on euploid embryos yield in preimplantation genetic testing for aneuploidy cycles compared to follicular phase stimulations? Summary answer Luteal phase stimulations …
View article: P-194 Antioxidants-enriched culture medium and its impact on blastocyst euploidy: insights from a prospective sibling oocyte study
P-194 Antioxidants-enriched culture medium and its impact on blastocyst euploidy: insights from a prospective sibling oocyte study Open
Study question What is the impact of a commercially available antioxidants-enriched culture medium on blastocyst ploidy rates? Summary answer The rates of euploidy, aneuploidy, as well as of low and high mosaics are comparable to those ach…
View article: P-616 Evaluating GnRH agonist trigger outcomes in Progestin-Primed (PPOS) versus GnRH antagonist ovarian stimulation protocols
P-616 Evaluating GnRH agonist trigger outcomes in Progestin-Primed (PPOS) versus GnRH antagonist ovarian stimulation protocols Open
Study question Do treatment outcomes differ between PPOS and GnRH antagonist protocols when a GnRH agonist is used for final oocyte maturation? Summary answer No significant differences were observed in oocyte yield, fertilization, blastul…
View article: P-637 Beyond Age: A data-driven exploration of factors influencing euploid embryo retrieval in ART
P-637 Beyond Age: A data-driven exploration of factors influencing euploid embryo retrieval in ART Open
Study question What other factors, besides female age, significantly influence the likelihood of having ≥3 euploid embryos in an IVF/ICSI cycle with preimplantation-genetic-testing for aneuploidies (PGT-A)? Summary answer Ovarian reserve p…
View article: O-158 The power of counseling: Reducing IVF cancellations and strengthening patient commitment
O-158 The power of counseling: Reducing IVF cancellations and strengthening patient commitment Open
Study question Can counseling reduce ovarian stimulation (OS) cancellation rates and improve patient’s adherence to treatment plans? Summary answer Counseling reduces significantly OS cancellations and enhances patient’s adherence and unde…
View article: P-038 Anti-Müllerian hormone and sperm concentration: a novel predictive marker for male fertility?
P-038 Anti-Müllerian hormone and sperm concentration: a novel predictive marker for male fertility? Open
Study question Is there a relationship between serum Anti-Müllerian hormone (AMH) and sperm concentration (SC) in men? Summary answer A positive and statistically significant relationship was observed between AMH and sperm concentration in…
View article: O-182 Timing matters: assessing the interval between blastocyst expansion and trophectoderm biopsy for live birth outcomes
O-182 Timing matters: assessing the interval between blastocyst expansion and trophectoderm biopsy for live birth outcomes Open
Study question How does the timing of trophectoderm (TE)-biopsy after blastocyst expansion impact live birth (LB) potential? Summary answer Delay in biopsy timing after blastocyst expansion is an independent predictor of LB. What is known …
View article: P-325 Can stored ultrasound images be used to identify adenomyosis? assessing the interobserver variability in sonographic diagnosis of adenomyosis
P-325 Can stored ultrasound images be used to identify adenomyosis? assessing the interobserver variability in sonographic diagnosis of adenomyosis Open
Study question Can different observers successfully identify adenomyosis, based on the revised MUSA (Morphological Uterus Sonographic Assessment) criteria, using archived ultrasound pictures? Summary answer Stored ultrasound pictures are i…
View article: P-649 Personalizing IVF Stimulation: The Effect of BMI on Serum FSH Levels and Gonadotropin Requirements
P-649 Personalizing IVF Stimulation: The Effect of BMI on Serum FSH Levels and Gonadotropin Requirements Open
Study question How does BMI influence serum FSH changes during ovarian stimulation and do the serum FSH changes from baseline to GnRH-antagonist day initiation predict the outcome? Summary answer Higher BMI dampens serum FSH increase durin…
View article: P-621 Enhanced FSH Stimulation Promotes LH-Receptor Expression in Granulosa Cells and Modulates Progesterone production at oocyte Retrieval
P-621 Enhanced FSH Stimulation Promotes LH-Receptor Expression in Granulosa Cells and Modulates Progesterone production at oocyte Retrieval Open
Study question Do increased gonadotropin doses used for ovarian stimulation result in an increase of LH- receptors on granulosa cells and a rise in progesterone levels? Summary answer Higher gonadotropin doses significantly increase LH-rec…
View article: Targeted Management of Adenomyosis: Frozen Embryo Transfer Outcomes With GNRH-Agonist and Letrozole Therapy
Targeted Management of Adenomyosis: Frozen Embryo Transfer Outcomes With GNRH-Agonist and Letrozole Therapy Open
Objective: To apply a combined protocol using GnRH agonists and letrozole for endometrial preparation in patients with severe adenomyosis undergoing frozen euploid single embryo transfer (eFET). Design: Case series. Setting: Tertiary refer…
View article: Undetected pregnancies in luteal phase stimulation − could they prevent ovarian hyperstimulation syndrome becoming a complication of the past?
Undetected pregnancies in luteal phase stimulation − could they prevent ovarian hyperstimulation syndrome becoming a complication of the past? Open
View article: Corrigendum to ‘Effect of overweight and obesity on live birth rate in single euploid frozen embryo transfers’ Reproductive BioMedicine Online 50(3) (2025) 104443
Corrigendum to ‘Effect of overweight and obesity on live birth rate in single euploid frozen embryo transfers’ Reproductive BioMedicine Online 50(3) (2025) 104443 Open
View article: Assisted Reproductive Technology Dataset of Embryo Time-lapse Images and Clinical Data
Assisted Reproductive Technology Dataset of Embryo Time-lapse Images and Clinical Data Open
In this report, we present Version 1.0 of the Assisted Reproductive Technology (ART) Dataset, a multi-modal fertility dataset from treatments performed at the ART Fertility Clinic in Abu Dhabi, United Arab Emirates, between 2015 and 2022. …
View article: O-246 A cutting-edge artificial intelligence system tracking embryo development and pinpointing the optimal day for blastocyst utilization
O-246 A cutting-edge artificial intelligence system tracking embryo development and pinpointing the optimal day for blastocyst utilization Open
Study question Can an AI model predict at which specific day (D) of development a blastocyst will reach expansion at a usable stage for biopsy/cryopreservation/transfer? Summary answer Our model achieved a high accuracy tracking embryos’ d…
View article: P-711 Female age at embryo creation and embryo transfer do not impact the ongoing pregnancy rates in single euploid frozen embryo transfers
P-711 Female age at embryo creation and embryo transfer do not impact the ongoing pregnancy rates in single euploid frozen embryo transfers Open
Study question Which factors influence the ongoing pregnancy rate in single euploid frozen embryo transfer (seFET) cycles? Summary answer Ongoing pregnancy rates in seFET cycles are significantly influenced by parity, BMI, embryo quality, …
View article: A novel antimüllerian gene mutation in a woman with high antral follicle count and extremely low serum antimüllerian hormone levels
A novel antimüllerian gene mutation in a woman with high antral follicle count and extremely low serum antimüllerian hormone levels Open
View article: Steady morphokinetic progression is an independent predictor of live birth: a descriptive reference for euploid embryos
Steady morphokinetic progression is an independent predictor of live birth: a descriptive reference for euploid embryos Open
STUDY QUESTION Can modelling the longitudinal morphokinetic pattern of euploid embryos during time-lapse monitoring (TLM) be helpful for selecting embryos with the highest live birth potential? SUMMARY ANSWER Longitudinal reference ranges …
View article: Avoiding weekend frozen embryo transfer in modified natural cycles: is it possible?
Avoiding weekend frozen embryo transfer in modified natural cycles: is it possible? Open
View article: REDEFINING THE NORMAL: THE NECESSITY TO RE-EVALUATE BASAL FSH RANGES FOR ACCURATE OVARIAN RESPONSE PREDICTION
REDEFINING THE NORMAL: THE NECESSITY TO RE-EVALUATE BASAL FSH RANGES FOR ACCURATE OVARIAN RESPONSE PREDICTION Open
View article: Editorial: Endometrial thickness as a risk factor for pregnancy complications
Editorial: Endometrial thickness as a risk factor for pregnancy complications Open
EDITORIAL article Front. Endocrinol., 05 June 2023Sec. Reproduction Volume 14 - 2023 | https://doi.org/10.3389/fendo.2023.1216952
View article: P-687 Serum Anti-Müllerian hormone to antral follicle count ratio does not predict euploidy rate in young patients who had at least 1 zygote after fertilization
P-687 Serum Anti-Müllerian hormone to antral follicle count ratio does not predict euploidy rate in young patients who had at least 1 zygote after fertilization Open
Study question Does serum Anti-Müllerian hormone to antral follicle count ratio predict euploidy rate in young patients who had at least 1 zygote after fertilization? Summary answer Serum Anti-Müllerian hormone to antral follicle count rat…
View article: P-678 Predictive value of intra-cycle FSH measurements for blastocyst euploid rate: a longitudinal cohort study
P-678 Predictive value of intra-cycle FSH measurements for blastocyst euploid rate: a longitudinal cohort study Open
Study question Can intra-cycle FSH levels measured at baseline, mid-cycle, and on trigger day predict blastocyst euploid rate? Summary answer Repeat measurements of FSH were not useful for predicting the euploid rate of blastocysts after a…
View article: O-096 Effect of Day-3 embryo morphology on blastocyst quality and ploidy: a machine-learning model of 34781 embryos
O-096 Effect of Day-3 embryo morphology on blastocyst quality and ploidy: a machine-learning model of 34781 embryos Open
Study question What is the predictive value of using Day-3 (D3) embryo morphology and clinical factors to identify good quality euploid blastocysts? Summary answer Using a machine-learning model, D3-cell count and fragmentation helps ident…
View article: O-144 Critical assessment of possible clinical benefits of culturing human embryos until day 7
O-144 Critical assessment of possible clinical benefits of culturing human embryos until day 7 Open
Study question Is there any benefit of extending culture until day (D) 7 to increase euploid blastocysts yield and clinical outcomes in a PGT-Aneuploidy analysis (PGT-A) program? Summary answer Extended culture until D7 increases euploid b…
View article: P-604 Inhibin B in Low Ovarian Reserve Patients: Correlation With Ovarian Reserve Markers and Oocyte Yield
P-604 Inhibin B in Low Ovarian Reserve Patients: Correlation With Ovarian Reserve Markers and Oocyte Yield Open
Study question Is there a correlation between Inhibin B (InhB) serum levels and oocyte yield after ovarian stimulation (OS) in women with low ovarian reserve? Summary answer InhB presents a positive relationship with oocyte yield during OS…
View article: P-501 Live birth rates (LBR) are not influenced by a change in embryo quality imposed by embryo cryopreservation and thawing in single euploid frozen embryo transfers.
P-501 Live birth rates (LBR) are not influenced by a change in embryo quality imposed by embryo cryopreservation and thawing in single euploid frozen embryo transfers. Open
Study question Is a change of embryo quality through vitrification and thawing associated with a reduced LBR when a single euploid frozen embryo transfer is performed? Summary answer Live birth rates are not influenced by a change in embry…