Erhan Demirdağ

ORCID: 0000-0003-4599-3854
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About
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Research Areas
  • Reproductive Biology and Fertility
  • Ovarian function and disorders
  • Reproductive System and Pregnancy
  • Pregnancy and preeclampsia studies
  • Endometriosis Research and Treatment
  • Ectopic Pregnancy Diagnosis and Management
  • Gynecological conditions and treatments
  • Uterine Myomas and Treatments
  • Gestational Diabetes Research and Management
  • Ovarian cancer diagnosis and treatment
  • Assisted Reproductive Technology and Twin Pregnancy
  • Maternal and Perinatal Health Interventions
  • Reproductive Health and Technologies
  • Maternal and fetal healthcare
  • Pregnancy-related medical research
  • Cancer Risks and Factors
  • Birth, Development, and Health
  • Reproductive Health and Contraception
  • Gestational Trophoblastic Disease Studies
  • Surgical Sutures and Adhesives
  • Sexual Differentiation and Disorders
  • Global Maternal and Child Health
  • Reproductive Physiology in Livestock
  • Thyroid Disorders and Treatments
  • Sperm and Testicular Function

Gazi University
2013-2025

Isparta University of Applied Sciences
2024

Sakarya Eğitim ve Araştırma Hastanesi
2023

Gazi Hastanesi
2022

Etlik Zübeyde Hanım Kadın Hastalıkları Eğitim ve Araştırma Hastanesi
2015-2017

Zübeyde Hanim Maternity Hospital
2015-2017

Sağlık Bilimleri Üniversitesi
2017

İstanbul Eğitim ve Araştırma Hastanesi
2017

Hormone replacement therapy (HRT) frozen embryo transfer (FET) cycles are common in assisted reproductive techniques. As the corpus luteum is absent these cycles, luteal phase support provided by administering progesterone (P4) through transvaginal, parenteral, or oral routes. Low serum levels of P4 (below 9-10 ng/mL) on day before (ET) have been associated with unfavorable cycle outcomes. The aim this study to investigate whether individualizing rescue protocols patients low improves...

10.3389/fendo.2024.1503008 article EN cc-by Frontiers in Endocrinology 2025-01-17

In this study, our objective was to evaluate the impact of testicular histopathology on outcome intracytoplasmic sperm injection (ICSI) cycles patients with nonobstructive azoospermia and correlate clinical hormonal parameters. For purpose, 271 azospermia (NOA) who underwent extraction (TESE) for ICSI were retrospectively evaluated retrieval, fertilisation, embryo cleavage, pregnancy live birth rates among different histology groups. We also correlated factors histological findings. Sperm...

10.1111/and.12510 article EN Andrologia 2015-12-20

Objective: Preeclampsia (PE) is a serious and common pregnancy issue. There systemic inflammation in PE it accompanied by increased oxidative stress, but the clear etiology has not been revealed. We aimed to predict with immune-inflammation index (SII) value calculated first trimester. Material methods: This retrospective study. One hundred fifty-seven pregnant women were included Twenty-seven excluded from Age, gravida, parity, hemogram values recorded patients' visit file records. The time...

10.7759/cureus.44063 article EN Cureus 2023-08-24

The aim is to identify the chronic endometritis (CE) incidence in recurrent implantation failure (RIF) patients undergoing vitro fertilization (IVF) treatment and compare IVF outcomes of RIF with CE following antibiotic therapy without CE. Another purpose described first cycle IVF.In this retrospective cohort study, was diagnosed CD-138 immunohistochemical staining. Among patients, two groups were formed as group 1, including treated by antibiotics (n = 129), 2, 103). Patients having similar...

10.1111/jog.15037 article EN Journal of Obstetrics and Gynaecology Research 2021-09-21

To evaluate the clinical significance of vaginal bleeding in pregnant women between 14th and 22th gestational weeks.This retrospective case-control study was conducted September 2010 December 2013. Two-hundred nineteen with weeks were compared 325 without for their maternal early neonatal outcomes.Mean age birth weight group significantly different from those control respectively (37.9 ± 2.8 versus 38.9 1.4 3071 710 3349 446 groups p < 0.001). Vaginal had increased risk having preterm (PB)...

10.3109/14767058.2015.1130815 article EN The Journal of Maternal-Fetal & Neonatal Medicine 2015-12-21

Our aim was to evaluate the obstetric outcomes of isolated oligohydramnios during early-term, full-term, and late-term periods, determine optimal timing delivery.A retrospective study performed at a tertiary center. Isolated cases were divided into groups. Evaluated fetal birthweight, 5-min Apgar score < 7, meconium-stained amniotic fluid, neonatal intensive care unit admission, transient tachypnea newborn (TTN), requirement ventilator, jaundice, mode delivery, induction labor, undiagnosed...

10.1111/jog.13024 article EN Journal of Obstetrics and Gynaecology Research 2016-05-26

To evaluate whether the duration of sexual abstinence has impact on oxidative stress in semen samples.Oxidative reaction was tested for different levels reactive oxygen species (ROS) by nitro blue tetrazolium assay 90 patients with diagnosis unexplained or male factor infertility that were grouped into 3 groups as 0-2 (group 1), 3-4 2) and >4 days 3) abstinence. Subsequently, remaining prepared gradient method ovarian stimulation intrauterine insemination (IUI) cycles to compare pregnancy...

10.1111/jog.14308 article EN Journal of Obstetrics and Gynaecology Research 2020-05-27

İzole tubal torsiyon tanısı alan hastaların klinik prezentasyonunu, preoperatif değerlendirmesini ve bu hastalara olan cerrahi yaklaşımı değerlendirmeyi amaçladık

10.4274/tjod.57984 article TR Journal of Turkish Society of Obstetric and Gynecology 2017-09-29

Objective: The cause of implantation defects in patients with recurrent failure (RIF) and pregnancy loss (RPL) has not been clearly established.We aimed to evaluate the immunohistochemical changes HOXA-11, β1 integrin, focal adhesion kinase (FAK), cluster differentiation 44 (CD44), extracellular matrix protein 1 (ECM1) molecules during receptive endometrial period RIF RPL. Materials Methods:This study was retrospectively conducted at a university hospital.After exclusion cases pathology that...

10.4274/tjod.galenos.2024.42959 article EN Journal of Turkish Society of Obstetric and Gynecology 2024-03-04

We compared wound dressing removal at 24 hours versus 48 following low-risk caesarean deliveries. This multicentre, randomised, controlled study included patients 18−44 years of age with term, singleton pregnancies. The randomisation was done weekly. Scheduled deliveries without labour were included. For comparison, the Additional treatment, Serous discharge, Erythema, Purulent exudate, Separation deep tissues, Isolation bacteria, Stay in hospital > 14 days (ASEPSIS) score for healing...

10.1080/01443615.2020.1736015 article EN Journal of Obstetrics and Gynaecology 2020-04-21

Abstract Aim: Our aim is to evaluate the effect of nifedipine on fetoplacental hemodynamic parameters. Methods: A retrospective study was conducted at a tertiary center with 30 patients for whom treatment used as tocolytic therapy preterm labor. Initiation this 31.6±2.5 weeks gestation. We combined pulse Doppler imaging parameters grayscale via Bernoulli theorem, which called “continuity equation”, get perfusion (FPP). Evaluated were resistance index (RI), pulsatility (PI), systole/diastole...

10.1515/jpm-2016-0072 article EN Journal of Perinatal Medicine 2016-07-07

This study aimed to compare the pregnancy outcomes of natural cycles (NC) and artificial (AC) in patients undergoing endometrial preparation for frozen-thawed embryo transfer (FET).This retrospective cohort was conducted a private infertility clinic between September 2016 January 2021 reviewed 1696 FET cycles. Among these cycles, protocols that are performed as NC (group 1) AC 2) were analyzed. Outcome measures live birth rates (LBR), clinical (CPR), implantation (IR), miscarriage (MR).The...

10.4274/tjod.galenos.2021.17981 article EN Journal of Turkish Society of Obstetric and Gynecology 2022-03-28

Aim: Caesarean section (CS) rates, as is the case in world, showed a significant increase Turkey over last decade. The World Health Organization has approved Robson10-Group Classification System (TGCS) global standard to facilitate analysis and comparison of CS rates. present study aimed analyze TGCS ratio determine reduction strategies. Methods: data for this retrospective cohort were collected from records women who gave birth between January 1, 2011 December 31, 2014 tertiary center. All...

10.28982/josam.805389 article EN Journal of Surgery and Medicine 2020-11-01

Cesarean scar ectopic pregnancies and molar are two very rare obstetric pathologies. In both cases, serious morbidities involved that require careful management. The coexistence of the clinical conditions is far less common there a limited number cases in literature. this case report, 34-year-old patient with previous cesarean section was diagnosed as having pregnancy through ultrasonography. asymptomatic at time. Ultrasonography revealed protruding mass her human chorionic gonadotropin...

10.4274/tjod.26878 article EN Journal of Turkish Society of Obstetric and Gynecology 2017-12-01

The study aimed to evaluate the impact of dual trigger with combination GnRH agonist and standard dose recombinant hCG on IVF outcomes in poor ovarian responders antagonist protocol. 1283 cycles 1010 responder patients according Bologna criteria were retrospectively analysed terms final oocyte maturation: group (250 μg + 0.2 mg triptorelin) or hCG). Primary outcome measures number retrieved mature oocytes. secondary clinical pregnancy rates live birth rates.The oocytes, top-quality embryos...

10.1080/01443615.2021.1945560 article EN Journal of Obstetrics and Gynaecology 2021-09-25

Cesarean section (CS) is a widely performed operation worldwide but data about uterine closure are lacking. We aimed to evaluate scar niches and compare single-layer double-layer at 6 months following CS.

10.55730/1300-0144.5906 article EN TURKISH JOURNAL OF MEDICAL SCIENCES 2024-01-01

Objective: It is likely that the subgroups of epidermal growth factor/platelet-derived factor (EGF/PDGF) signaling pathway play a role in etiopathogenesis intrauterine restriction (IUGR).This study was planned to understand molecular genetic level apoptosis IUGR. Method:The EGF/PDGF gene profile (40 genes) investigated using real-time reverse transcriptase-polymerase chain reaction.The expressions IUGR group were compared both individually and as group.Individual differences also...

10.12996/gmj.galenos.2023.3635 article EN cc-by Gazi Medical Journal 2024-01-01

Objectives To evaluate whether the dual trigger of ovulation with a gonadotropin-releasing hormone (GnRH) agonist and standard dose recombinant human chorionic gonadotropin (hCG) (dual trigger) is better than hCG alone in vitro fertilization (IVF) cycles patients who responded well to ovarian stimulation. Methods Between January 2013 December 2021, 5593 antagonist were reviewed. This study included women had an antral follicle count 5 or more exhibited normoresponse stimulation using GnRH...

10.7759/cureus.45623 article EN Cureus 2023-09-20
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