Publications by authors named "Cem Somer Atabekoglu"

Background: Anti-Müllerian hormone (AMH) is a widely used marker for estimating ovarian reserve, and it may predict response to ovarian stimulation. While AMH is considered a stable, cycle-independent marker, studies have shown it can exhibit significant fluctuations based on factors like age, reproductive stage, and menstrual cycle phase. The fluctuations in AMH levels can make it challenging to predict individual responses accurately, particularly when the AMH is not measured in the COS cycle.

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Study Objective: To define objective and readily applied diagnostic criteria for Y-shaped uteri using 3-dimensional transvaginal ultrasound (3D-TVUS) volume recordings.

Design: A retrospective case-control diagnostic measurements study.

Setting: A tertiary university hospital's reproductive health and research center.

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The aim of this systematic review and meta-analysis was to quantify the effect of random start ovarian stimulation (RSOS) compared with conventional start ovarian stimulation (CSOS) in cancer patients before gonadotoxic treatment. The final analytical cohort encompassed 688 RSOS and 1076 CSOS cycles of cancer patients before gonadotoxic treatment. Eleven studies were identified by database searches of MEDLINE, Cochrane Library and cited references.

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Background: With increased success, ovarian tissue cryopreservation has recently become a standard technique for fertility preservation. However, malignant cell introduction through ovarian tissue transplantation remains a major concern for patients with acute leukemias.

Objective: This study aimed to investigate the safety of performing autologous ovarian tissue transplantation in survivors of acute leukemia.

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Objective: To compare cord-blood anti-Müllerian hormone levels between female newborns from women with and without polycystic ovary syndrome.

Methods: A prospective case-control study was conducted in Ankara University School of Medicine, Department of Obstetrics and Gynecology between June 2020 and January 2021. In total, 408 women gave birth to a female during the study period.

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Objective: Cryopreservation techniques are used to preserve fertility before cancer treatment with gonadotoxic agents. Herein, we report a case of fertility preservation involving a 29-year-old G0P0 woman, married for one year, who was referred to our hospital for fertility preservation before starting rectal cancer treatment.

Case Description: Ovarian tissue and embryo cryopreservation were performed.

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Objective: Endometrioma surgery is associated with a reduction in ovarian reserve. However, removal of an endometrioma may increase the likelihood of a spontaneous conception. The objective of this study was to assess the pre-operative and operative variables affecting spontaneous conception following endometrioma surgery.

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Objectives: To compare success rates and complications in women undergoing laparoscopic versus open surgical management of tubo-ovarian abscess. We further examined whether early laparoscopic intervention has any impact on pregnancy rates in a subgroup of infertile patients following frozen-thawed embryo transfer.

Material And Methods: Hospital records of 48 patients diagnosed with TOA between January 2015 and December 2020, who underwent surgical intervention or received only medical treatment were analyzed.

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This study aims to assess the impact of endometrioma on embryo quality and cycle outcome in patients who undergo assisted reproductive technology (ART) treatment due to diminished ovarian reserve (DOR). Retrospective case-control study was conducted in women ≤ 40 years of age who underwent ART treatment caused by DOR, defined according to POSEIDON criteria, at a university-based infertility clinic between January 2015 and December 2020. Three groups of patients were selected: group A included patients with an idiopathic DOR, group B included patients with endometrioma(s) who underwent ovarian cystectomy, and group C included patients with endometrioma(s) without surgical treatment.

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High levels of serum inflammatory markers are related to extended hospitalisation and more severe disease in the case of tubo-ovarian abscess (TOA). There is scarce information on the serial measurement of inflammatory markers during the postoperative follow-up period of surgically treated TOA. The present study aimed to assess the postoperative longitudinal changes in serum inflammatory markers following surgery for TOA.

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Objective: To assess the impact of an estrogen replacement regimen on frozen embryo transfer (FET) cycle outcome.

Methods: In the present retrospective cohort study, data of infertile women undergoing FET with good-quality embryos were reviewed. The first group received 2 mg of estradiol hemihydrate (EH) once daily for 6 to 7 days, then twice daily for 4 to 5 days, and then three times a day until embryo transfer.

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Although ovarian tissue cryopreservation is still considered as an experimental technique, several authors from around the world have reported successful and promising results. Currently, oocyte cryopreservation seems to be the most feasible technique for fertility preservation when there's some kind of a time constraint in adolescents and adults. However, it has been estimated that a young woman would be expected to have a 94% likelihood of having a live birth with 20 mature frozen oocytes (1).

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Despite the advances in controlled ovarian stimulation (COS), management of a subgroup of poor ovarian responder patients may still be challenging. We describe a feasible and simplified protocol, namely the STOP-START protocol, for poor responders defined as Patient-Oriented Strategies Encompassing Individualize D Oocyte Number (POSEIDON) groups 3 and 4, who are unresponsive to COS with maximum dose gonadotrophins. Data of 11 women unresponsive to COS were reviewed.

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Objective: The aim of the study is to create a new model to predict successful outcome in assisted reproductive techniques.

Materials And Methods: A retrospective cohort study was conducted in tertiary fertility center between 2010 and 2017. Nulliparous women younger than 45 years-old undergoing in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) for the first time were included; frozen embryo transfers, canceled induction cycles, freeze-all cycles were excluded.

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The present retrospective cohort study analysed data of couples with unexplained infertility who underwent two to three intrauterine insemination (IUI) cycles. The inclusion criteria were age 20-40 years, failure to conceive for at least two years of unprotected intercourse, ovulation, normal semen analysis, and tubal patency. Total of 578 IUI cycles of 286 couples with unexplained infertility were included in the final analyses.

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Objective: The present study aims to assess the success of controlled ovarian stimulation in intrauterine insemination cycles stimulated by recombinant-FSH and Clomiphene citrate for either mono- or bi-follicular development.

Methods: We assessed 870 infertile patients treated with controlled ovarian stimulation in intrauterine insemination cycles at a university-based infertility clinic between January 2012 and December 2017. We compared the cycles stimulated by clomiphene citrate and recombinant-FSH in two set-ups; mono- and bi-follicular development.

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Objective: To assess the association between hCG day progesterone levels and subsequent frozen-thawed embryo transfer (FET) cycle outcome in infertile women with and without polycystic ovary syndrome (PCOS).

Method: Data of 178 women who underwent FET at a university-based infertility clinic between January 2016 and December 2019 were reviewed. The study group consisted of women who had progesterone elevation (PE) during fresh controlled ovarian stimulation (COS) cycle.

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Article Synopsis
  • Conventional assisted reproductive technology (ART) can delay cancer treatment and increase psychological stress among patients, prompting a study to compare random start (RS-COH) and conventional start (CS-COH) protocols for fertility preservation in cancer patients.
  • The study involved 111 patients, focusing on outcomes like the number of oocytes and embryos produced, with findings showing that RS-COH provided a higher median number of MII (metaphase II) oocytes (7 vs. 5) but required longer stimulation time (12 vs. 10 days).
  • Ultimately, the results indicated that RS-COH is as effective in producing viable oocytes as CS-COH, thereby making it a viable option for cancer patients needing
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Purpose: To assess the association between operative hysteroscopy prior to assisted reproductive technology (ART) cycle and cervical insufficiency (CI) in the second trimester of pregnancy.

Methods: A retrospective cohort study was conducted. The charts of all women who got pregnant following an ART cycle between January 2015 and June 2018 were reviewed.

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Objective: The feasibility of a gonadotropin-releasing hormone agonist (GnRHa) trigger in normal responders is still a matter of debate. The aim of this study was to compare the number of mature oocytes, the number of good-quality embryos, and the live birth rate in normal responders triggered by GnRHa alone, GnRHa and human chorionic gonadotropin (hCG; a dual trigger), and hCG alone.

Methods: A retrospective cohort study was conducted at the infertility clinic of a university hospital.

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Human menopausal gonadotropin (hMG) has LH activity, and it may have beneficial effects in terms of oocyte quality and endometrial receptivity similar to recombinant LH supplementation. The aim of this study was to assess the effects of hMG, and its commencement time on the outcome of assisted reproductive technology (ART) cycles of POSEIDON group 3 and 4 poor responders. Data of 558 POSEIDON group 3 and 4 poor responders who underwent ART treatment following a GnRH antagonist cycle at a university-based infertility clinic between January 2014 and December 2019 were reviewed.

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The aim of this study was to assess the effect of laparoscopic removal of endometrioma on assisted reproductive technology (ART) outcome. A retrospective cohort study was conducted at a university hospital between January 2014 and December 2017. The ART group consisted of 26 women who underwent 44 ART cycles in the presence of ovarian endometrioma and the surgery group consisted of 53 women who underwent 58 ART cycles after laparoscopic removal of ovarian endometrioma/s.

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Objective(s): To assess the association between the ultrasonographic presence of adenomyosis and recurrent miscarriage (RM).

Study Design: A prospective matched case-control study was conducted between March 2018 and December 2018 at Ankara University Hospital. A total of 132 women were assessed with transvaginal ultrasonography for the presence of adenomyosis markers.

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Background/aim: To investigate the relationship between subfertility etiologies and success rates in controlled ovarian stimulation and intrauterine insemination (COS–IUI) cycles.

Materials And Methods: The medical records of 218 couples who applied to a university-based fertility center were analyzed retrospectively. Detailed infertility examination data and pregnancy outcomes were compared according to different subfertility etiologies.

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Industrial production and use of boron compounds have increased during the last decades, especially for the manufacture of borosilicate glass, fiberglass, metal alloys and flame retardants. This study was conducted in two districts of Balıkesir; Bandırma and Bigadic, which geographically belong to the Marmara Region of Turkey. Bandırma is the production and exportation zone for the produced boric acid and some borates and Bigadic has the largest B deposits in Turkey.

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