Tunde Herman

Dr. Tunde Herman


Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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Verified
Journal Article
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Giuseppe GulloGiuseppe Gullo
Giuseppe Gullo
Gaspare CucinellaGaspare Cucinella
Gaspare Cucinella
VCVito Chiantera
Vito Chiantera
MDMiriam Dellino
Miriam Dellino
Eliano CascardiEliano Cascardi
Eliano Cascardi
Antonio Simone LaganàAntonio Simone Laganà
Antonio Simone Laganà
Endometrial cancer represents the fifth most common cancer in women, and the most common gynecological malignancy in developed countries

7 December 2022 in Reproductive Sciences
Verified
Journal Article
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THTunde Herman
Tunde Herman
SCSzilvia Csehely
Szilvia Csehely
MOMonika Orosz
Monika Orosz
HBHarjit Pal Bhattoa
Harjit Pal Bhattoa
TDTamás Deli
Tamás Deli
AJAttila Jakab
Attila Jakab
Endocrine disorders negatively influence the ovarian function, and increasing incidence of endocrine diseases with age may have further negative effects on pregnancy rate. Prospective cohort study of 231 consecutively enrolled patients underwent IVF treatment. In patients with known endocrine disorders, the laboratory parameters were corrected before IVF treatment. One hundred sixty one patients (69.7%) had at least one known and treated endocrine disorder (study group), and 70 patients were endocrine negative (control group). Endocrine disorders diagnosed were thyroid disorders (32.5%), diminished ovarian reserve (23.8%), insulin resistance (22.5%), PCOS (15.2%), hyperprolactinaemia (13.4%), obesity (12.1%), hypogonadotropic hypogonadism (0.8%) and congenital adrenal hyperplasia (0.2%). Before the IVF treatment, systematic endocrine laboratory examinations were performed in all patients. Higher age, BMI and FSH were found in the study group, while AMH level was lower. There were no differences in LH, E2, prolactin, TSH, FT3, FT4, TT, DHEAS, androstendione, 17-OHP and SHBG level between the study and control groups. The study group had higher baseline glucose, baseline insulin, 120-min glucose and 120-min insulin level after oral glucose tolerance test. With no difference in the IVF cycles performed, pregnancy rate was lower in the study group (61.43% vs. 34.16%; p = 0.003), and this difference (p = 0.0151) remained in age-corrected rates, as well. The analyses were also performed in individual endocrinology groups. The prevalence of endocrine disorders is high in females participating in IVF programs, and they are often accompanying each other. Even after proper correction, the presence of the endocrine disorder negatively influences the pregnancy rate in IVF treatment.

17 February 2024 in Gynecologic and Obstetric Investigation
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THTunde Herman
Tunde Herman
PTPéter Török
Péter Török
Antonio Simone LaganàAntonio Simone Laganà
Antonio Simone Laganà
VCVito Chiantera
Vito Chiantera
RVRenato Venezia
Renato Venezia
AJAttila Jakab
Attila Jakab
Objective: The objective of this study was to analyze the impact of thyroid autoimmunity (TAI) on reproductive outcome parameters of intracytoplasmic sperm injection (ICSI) cycles as compared to TAI-negative ICSI cycles. Design: In this single in vitro fertilization (IVF) center retrospective study, 86 infertile women with elevated thyroid peroxidase or TGAb levels, but euthyroid after thyroxine replacement (study group), were compared to 69 female patients with no thyroid abnormalities (controls). Following ICSI treatment fertilization rate (FR), clinical pregnancy rate (CPR), miscarriage rate (MR), and live birth rate (LBR) were analyzed. Materials, Setting, Methods: All subjects with various infertility factors were treated with ICSI in university-based IVF center. Patients in the study group received thyroxine replacement and were euthyroid at IVF treatment. Before the IVF cycles, endocrinological parameters were uniformly assessed: thyroid function and antibodies, reproductive hormones (anti-Müllerian hormone [AMH], follicular stimulating hormone [FSH], luteinizing hormone, E2, PRL, testosterone, DHEAS, 17-OHP, AD) and OGTT (0–60–120 min glucose and insulin). Following descriptive comparison of laboratory parameters, age-adjusted analyses of FR, CPR, MR, and LBR were performed. Results: TAI-positive women were older (mean age 35.31 ± 4.95 vs. 32.15 ± 4.87 years; p = 0.002), had higher FSH (8.4 ± 3.4 vs. 7.4 ± 2.32 U/L; p = 0.024), higher E2 (53.94 ± 47.61 vs. 42.93 ± 18.92 pg/mL; p = 0.025) levels, while AMH (2.88 ± 2.62 vs. 3.61 ± 1.69 ng/mL; p = 0.0002) was lower. There were no differences in TSH levels (1.64 ± 0.96 vs. 1.66 ± 0.65 µIU/mL; p = 0.652) between the two groups. FT3 (2.63 ± 0.58 vs. 2.98 ± 0.55 pg/mL; p = 0.002) was lower and FT4 (1.3 ± 0.29 vs. 1.13 ± 0.21 ng/dL; p = 0.0002) was higher in the TAI-positive group, reflecting clinically irrelevant differences. Egg cell counts (6 ± 3.8 vs. 7.5 ± 3.95; p = 0.015) were lower in TAI and remained so following age adjustment. Although the overall ICSI FR did not differ (62.9% vs. 69.1%, p = 0.12), it was lower for patients under 35 with TAI showing decreasing differences in line with age. The CPR (36.04% vs. 69.56%; p < 0.001) and LBR (23.25% vs. 60.86%; p < 0.001) were lower, the MR (35.48% vs. 12.5%; p = 0.024) was higher in the TAI group, and these differences remained after age adjustment. Limitations: Since the higher age of the study group may interfere with the effect of TAI, age adjustment calculations were necessary to perform to eliminate this confounding factor. Conclusion: Despite optimal thyroid supplementation in clinical or subclinical hypothyroidism, the presence of TAI negatively influences CPR and is connected to a higher MR, thus resulting in a lower LBR after ICSI. Decreased FR with ICSI in TAI patients may also contribute to poorer outcomes, especially in younger women.

Verified
Journal Article
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SCSzilvia Csehely
Szilvia Csehely
AKAdrienn Kun
Adrienn Kun
EOEdina Orbán
Edina Orbán
Tamás KatonaTamás Katona
Tamás Katona
MOMonika Orosz
Monika Orosz
AJAttila Jakab
Attila Jakab
Background/Objectives: Premature ovarian insufficiency (POI) is a leading cause of hypoestrogenism in women under the age of 40 years and is associated with an increased risk of impaired bone health. Early diagnosis and timely hormonal intervention are essential to prevent irreversible bone loss. However, diagnostic delay is not uncommon in clinical practice. Methods: We conducted a retrospective analysis of 168 women diagnosed with POI or early menopause (EM) between 2017 and 2024 at a tertiary gynecological endocrinology unit. Bone mineral density (BMD) and T-score were assessed by dual-energy X-ray absorptiometry (DXA) at the time of diagnosis in 125 patients, of whom 116 had secondary amenorrhea. The interval between the last menstrual period (LMP) and diagnosis was used to assess the impact of diagnostic delay. The patients were further stratified by serum estradiol (E2) levels and body mass index (BMI). Results: At the time of diagnosis, 43.1% of patients had osteopenia, and 10.3% had osteoporosis. A statistically significant negative correlation was observed between time to diagnosis and BMD (r = −0.225, p = 0.022), with a similar trend seen for T-score (r = −0.211, p = 0.031). In patients with E2 ≤ 5 ng/L, the association was stronger (BMD: r = −0.401, p = 0.026). Lower E2 levels tended to be associated with poorer bone health in women with a BMI < 25 kg/m2, whereas no such trend was observed in those with a higher BMI. Conclusions: Our findings indicate that diagnostic delay in POI is associated with deterioration in bone health, particularly in lean patients and those with severe hypoestrogenism. These results underscore the importance of early recognition and timely initiation of hormone therapy to preserve bone mass and reduce long-term skeletal complications.

21 September 2024 in Journal of Clinical Medicine
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Journal Article
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MOMonika Orosz
Monika Orosz
FBFanni Borics
Fanni Borics
DRDávid Rátonyi
Dávid Rátonyi
Zoárd Dr. KrasznaiZoárd Dr. Krasznai
Zoárd Dr. Krasznai
BVBeáta Vida
Beáta Vida
TDTamás Deli
Tamás Deli
Background/Objective: Infertility affects an estimated 40–50% of women with polycystic ovary syndrome (PCOS), the leading cause of anovulatory infertility, but only a small proportion of the patients require in vitro fertilization (IVF) therapy. Both PCOS and IVF are associated with an increased risk of obstetric complications. To compare preconception endocrine profiles and symptoms, as well as obstetric outcomes of PCOS patients who achieved successful pregnancies with and without IVF treatment. Methods: A single-center retrospective cohort study was conducted. Data spanning from 2012 to 2019 were compiled from patients with PCOS who visited the Gynecologic Endocrinology Unit and the Infertility Unit at the Department of Obstetrics and Gynecology, University of Debrecen. Patients diagnosed with PCOS who had had at least one successful delivery beyond the 23rd gestational week at the department were eligible for inclusion in the study. Results: Fifteen percent of the 206 pregnancies leading to successful deliveries of 232 newborns in our cohort conceived with IVF. A one year increase in the maternal age increased the odds of being in the IVF group by 22% (OR: 1.222, 95% confidence interval, CI: 1.11–1.35, p < 0.001). Baseline DHEAS and androstenedione levels were significantly lower in the IVF group as compared to the non-IVF group: 1 μmol/L increase in the DHEAS level decreased the odds of being in the IVF group by 18% (OR: 0.82, 95% CI: 0.66–1.01, p = 0.06), and 1 μg/L increase in the serum androstenedione concentration decreased the same odds by 42% (OR: 0.58, 95% CI: 0.33–1.02, p = 0.056). DHEAS levels <6.5 μmol/L had an OR 3.86 (95% CI 1.10–13.50, p = 0.04) and LH/FSH ratio <1.3 had an OR 3.58 (95% CI 1.18–10.81, p = 0.03) for being in the IVF group. The birth weight (3069 ± 683 g vs. 3362 ± 638 g, p = 0.02) and the gestational age (37.23 ± 2.55 vs. 38.54 ± 2.28 weeks, p = 0.004) were significantly lower in the IVF group, but in the singleton subgroups, no significant differences could be found. Birth weight percentiles showed no significant difference in either subgroup. In the IVF group, both preterm delivery (29% vs. 8.3%, OR 4.53, 95% CI 1.75–11.70, p = 0.002; singleton subgroup: 17.4% vs. 6.3%, OR 3.12, 95% CI 0.89–10.92, p = 0.07) and cesarean section (71% vs. 43.2%, OR 3.22, 95% CI 1.40–7.40, p = 0.006; singleton subgroup: 65.2% vs. 42.4%, OR 2.55, 95% CI 1.02–6.35, p = 0.04) were more frequent than in the non-IVF group. Gestational diabetes and preeclampsia were not significantly different in the IVF and non-IVF groups. Conclusions: In PCOS patients with successful pregnancies, those who conceive with IVF seem to be different in their baseline hormone levels and symptoms from the non-IVF group. Adverse obstetric outcomes are more common in the IVF group, and some of these differences persist when adjusting for singleton pregnancies and maternal age, too.

8 August 2023 in Research Square
Verified
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THTunde Herman
Tunde Herman
PTPéter Török
Péter Török
ALAntonio Simone Laganà
Antonio Simone Laganà
VCVito Chiantera³
Vito Chiantera³
AJAttila Jakab
Attila Jakab
Purpose: We retrospectively analyzed how the presence of thyroid autoimmunity (TAI positive) affected reproductive parameters in eighty-six (86) TAI positive women referred to IVF treatment. Methods: All participants diagnosed with subclinical or overt hypothyroidism, while euthyroid on thyroxine replacement. Sixty-nine (69) female patients in the same IVF program, with no thyroid abnormalities served as controls (TAI negative group). Results: Statistically significant baseline hormone profile differences were found in multiple parameters between the two groups. TAI positive women were older (mean age 34.7±5.42 vs. 32.32±5.04 years; p=0.002), had higher FSH (8.4±3.49 U/L vs. 7.04±2.32 U/L; p=0.024), higher E2 (53.94±47.61 vs. 42.93±18.92 pg/ml; p=0.025) levels, while their AMH (2.88±2.62 vs. 3.6±1.69 ng/ml; p=0.0002) was lower. There were no differences in TSH levels (1.64±0.96 vs. 1.66±0.65 uIU/ml; p= 0.652) between the two groups, FT3 (2.63±0.58 vs. 2.98±0.55 pg/ml; p=0.002) was lower and FT4 (1.304±0.29 vs. 1.13±0.21 ng/dl; p=0.0002) was higher in the TAI positive group. Egg cell counts (6.0±3.82 vs. 7.5±3.95; p=0.015), clinical pregnancy rate (36.04 % vs. 69.56 %; p<0.001), live birth rate (23.25 % vs. 60.86 %) were lower, the miscarriage rate (35.48 % vs. 12.5 %; p=0.024) was higher in the TAI positive group. There was no difference in ICSI fertilization rate (69.12 % vs 62.91 %, p=0,12), although the fertilization rate was lower for patients under 35 in the TAI positive group, after adjusting for age. Conclusion: TAI positive women carry a multitude of endocrine and metabolic parameters which may contribute to unfavorable effects on reproductive health.