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Dive into the research topics where Leonidas Zepiridis is active.

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Featured researches published by Leonidas Zepiridis.


Human Reproduction Update | 2012

The use of androgens or androgen-modulating agents in poor responders undergoing in vitro fertilization: a systematic review and meta-analysis

Julia K. Bosdou; Christos A. Venetis; Efstratios M. Kolibianakis; Konstantinos A. Toulis; Dimitrios G. Goulis; Leonidas Zepiridis; Basil C. Tarlatzis

BACKGROUND The aim of this meta-analysis was to evaluate the role of androgens or androgen-modulating agents on the probability of pregnancy achievement in poor responders undergoing IVF. METHODS Medline, EMBASE, CENTRAL, Scopus and Web of Science databases were searched for the identification of randomized controlled trials evaluating the administration of testosterone, dehydroepiandrosterone (DHEA), aromatase inhibitors, recombinant luteinizing hormone (rLH) and recombinant human chorionic gonadotrophin (rhCG) before or during ovarian stimulation of poor responders. RESULTS In two trials involving 163 patients, pretreatment with transdermal testosterone was associated with an increase in clinical pregnancy [risk difference (RD): +15%, 95% confidence interval (CI): +3 to +26%] and live birth rates (RD: +11%, 95% CI: +0.3 to +22%) in poor responders undergoing ovarian stimulation for IVF. No significant differences in clinical pregnancy and live birth rates were observed between patients who received DHEA and those who did not. Similarly, (i) the use of aromatase inhibitors, (ii) addition of rLH and (iii) addition of rhCG in poor responders stimulated with rFSH for IVF were not associated with increased clinical pregnancy rates. In the only eligible study that provided data, live birth rate was increased in patients who received rLH when compared with those who did not (RD: +19%, 95% CI:+1 to +36%). CONCLUSIONS Based on the limited available evidence, transdermal testosterone pretreatment seems to increase clinical pregnancy and live birth rates in poor responders undergoing ovarian stimulation for IVF. There is insufficient data to support a beneficial role of rLH, hCG, DHEA or letrozole administration in the probability of pregnancy in poor responders undergoing ovarian stimulation for IVF.


Journal of Assisted Reproduction and Genetics | 2006

The effects of sperm quality on embryo development after intracytoplasmic sperm injection

Kalliopi E. Loutradi; Basil C. Tarlatzis; Dimitrios G. Goulis; Leonidas Zepiridis; Thoula Pagou; Elisabeth Chatziioannou; Grigoris F. Grimbizis; Ioannis Papadimas; Ioannis Bontis

Purpose : To explore the possible relationship between sperm quality and embryo development, pregnancy and implantation rates, in patients undergoing intracytoplasmic sperm injection (ICSI). Methods : Fertilization and cleavage rates, quality of embryos, blastocyst development, pregnancy and implantation rates were analyzed in 1020 embryos from 219 couples undergoing first ICSI treatment cycle. The couples were allocated in five groups, according to semen parameters: Group 1: patients with normal semen parameters, Group 2: patients with mild oligo-astheno-teratozoospermia, Group 3: patients with severe oligo-astheno-teratozoospermia, Group 4: patients with obstructive azoospermia, Group 5: patients with non-obstructive azoospermia. Results : Fertilization and cleavage rates, quality of embryos as well as blastocyst development rates were significantly reduced, as semen quality decreased. However, no significant differences were observed in clinical pregnancy and implantation rates. Conclusion : Overall, a negative relationship was observed between semen quality and embryo development, even before activation of the embryonic genome, suggesting that sperm can affect embryogenesis from a very early stage.


Acta Obstetricia et Gynecologica Scandinavica | 2007

Pregnancy and oral health: utilisation of dental services during pregnancy in northern Greece.

Konstantinos Dinas; Vassilios Achyropoulos; Emmanouel Hatzipantelis; Georgios Mavromatidis; Leonidas Zepiridis; Theodoros Theodoridis; Dimitrios Dovas; Tantanasis T; Fotios Goutzioulis; J. Bontis

Background. Recent studies have shown that gingivitis and periodontal infection during pregnancy represent an independent risk factor for pre‐term birth. However, little is known about the prevalence and correlates of dental attendance during pregnancy. Methods. During the first 3 days postpartum, an anonymous questionnaire was administered to 425 women in order to explore their dental condition and utilisation of dental health services during pregnancy, as well as their perceptions on the potential associations between dental care during pregnancy and pregnancy outcomes. Results. Almost half of the respondents (46.8%) reported symptoms of gingivitis during their pregnancy. Pregnancy gingivitis was independently associated with non‐Greek ethnicity (p = 0.008), multiparity versus primiparity (p<0.005), lower economic class versus middle and upper classes (p = 0.001), and the lack of routine primary dental care (p = 0.005). Some 27.3% reported a visit to the dentist during their pregnancy. The majority (72.2%) believed that dental treatment during pregnancy might have a negative affect on pregnancy outcome. The presence of pregnancy gingivitis and the belief that dental treatment during pregnancy is safe were both independently associated with visiting a dentist during pregnancy (p<0.0005 for both). Conclusions. Despite the increased prevalence of dental problems among pregnant women, few women seek dental services in this population, which can be primarily attributed to womens erroneous beliefs regarding the safety of dental examination. Therefore, there is an imperative need to offer oral health education and develop preventive programs for women of reproductive age.


Cases Journal | 2009

Laparoscopic management of mesenteric cyst: a case report

Theodoros Theodoridis; Leonidas Zepiridis; Dimitrios Athanatos; Filippos Tzevelekis; Diamantis Kellartzis; J. Bontis

Mesenteric cysts are rare intra-abdominal lesions with variable clinical symptoms and signs that make pre-operative diagnosis difficult. Optimal treatment is surgical excision of the cyst with laparotomy or laparoscopy. We present a case of mesenteric cyst that was misdiagnosed as para-ovarian cyst and managed laparoscopically by gynaecologists.


Human Reproduction | 2011

Does cessation of progesterone supplementation during early pregnancy in patients treated with recFSH/GnRH antagonist affect ongoing pregnancy rates? A randomized controlled trial

Dimitra Kyrou; Human M. Fatemi; Leonidas Zepiridis; A. Riva; E.G. Papanikolaou; Basil C. Tarlatzis; Paul Devroey

BACKGROUND The aim of this study was to assess whether the cessation of progesterone (P) supplementation during early pregnancy after GnRH antagonist cycles is not inferior to its continuation in terms of pregnancy rates beyond 12 weeks of gestation METHODS There were 200 patients, with a positive β-hCG test (followed by a doubling in β-hCG levels 48 h later) after a fixed recombinant FSH (recFSH)/GnRH antagonist protocol for IVF/ICSI and a Day-3 fresh embryo transfer (ET), participated in this randomized controlled study. All patients received luteal support, with 200 mg vaginal P being administered three times daily for 14 days, beginning on the day of ET until the second β-hCG test, 16 days post-ET. In the control group (n = 100) the administration of P was continued until 7 weeks of gestation. In the study group (n = 100), vaginal P was discontinued on the 16th day post-ET RESULTS: The ongoing pregnancy rate beyond 12 weeks, the primary outcome measure, did not differ between the study and control groups (82 versus 73%, P = 0.175; difference 9%, 95% CI: -2.6 to 20.3). There were also no significant differences observed between the study and control group in terms of abortion before or after 7 weeks of gestation [(9 versus 12%, P = 0.645) and (8 versus 10%, P = 0.806), respectively]. The same was true for bleeding episodes (14 versus 19%, P = 0.446). CONCLUSIONS After recFSH/GnRH antagonist cycles, the withdrawal of P supplementation in early pregnancy, with normally increasing β-hCG levels on the 16th day post-ET, had no significant clinical impact in terms of ongoing pregnancy rates beyond 12 weeks.


Journal of Obstetrics and Gynaecology | 2009

Awareness of human papillomavirus infection, testing and vaccination in midwives and midwifery students in Greece

Konstantinos Dinas; Maria Nasioutziki; O. Arvanitidou; Georgios Mavromatidis; Panagiotis Loufopoulos; Konstantinos Pantazis; Dimitrios Dovas; Angelos Daniilidis; N. Tsampazis; Leonidas Zepiridis; Theodoros Theodoridis; A. Loufopoulos

Summary Midwives play an important role in the implementation of cervical cancer screening. We assessed the knowledge of human papillomavirus (HPV) infection and of its relationship with cervical cancer in 107 midwives and 29 graduating midwifery students. The majority of midwives (78.5%) were aware that a viral infection causes cervical cancer, whereas only 48.3% of the students knew this (p = 0.003). Only one midwife (0.9%) was not aware of HPV infection compared with 10.3% of the students (p = 0.029). Midwives were also more knowledgeable of the relationship between HPV infection and cervical cancer and of the availability of a vaccine against HPV infection (p = 0.005 and p < 0.0001, respectively). In conclusion, Greek midwives have a satisfactory level of knowledge about cervical cancer and HPV infection, in contrast to midwifery students. It is important to better educate midwifery students in order to facilitate the incorporation of HPV testing and vaccination in clinical practice.


Reproductive Biomedicine Online | 2004

Case report: Laparoscopic treatment of a ruptured interstitial pregnancy

Grigoris F. Grimbizis; Tryfon Tsalikis; Themistoklis Mikos; Leonidas Zepiridis; Apostolos Athanasiadis; Basil C. Tarlatzis; J. Bontis

Interstitial pregnancy is a rare but life-threatening condition. A case of a 28-year-old woman with a partially ruptured interstitial pregnancy treated with operative laparoscopy is presented. A laparoscopic cornual resection and a left salpingectomy were performed uneventfully. Serum beta-human chorionic gonadotrophin concentrations were measured serially at weekly intervals until resolved on day 20 postoperatively. It seems, therefore, that laparoscopic treatment is still an effective option for management even in ruptured interstitial pregnancy, preserving the anatomical integrity of the uterus and future fertility, and that rupture of interstitial ectopic pregnancy is not a contra-indication for laparoscopy.


Reproductive Biomedicine Online | 2006

Laparoscopic management of unicornuate uterus with non-communicating rudimentary horn (three cases)

Theodoros Theodoridis; Haralambos Saravelos; Konstantinos Chatzigeorgiou; Leonidas Zepiridis; Grigoris F. Grimbizis; Dimitrios Vavilis; Aristotelis Loufopoulos; J. Bontis

This article describes the laparoscopic management of unicornuate uterus with a non-communicating rudimentary horn in three women who presented with lower abdominal pain and dysmenorrhoea. The patients were managed with laparoscopic removal of the rudimentary horn along with the ipsilateral salpinx. No complications were noted intraoperatively and the patients remain asymptomatic.


The European Journal of Contraception & Reproductive Health Care | 2008

Knowledge and practice of contraception among Greek female medical students

Konstantinos Dinas; Emmanuel Hatzipantelis; Georgios Mavromatidis; Leonidas Zepiridis; Tzafettas J

Objective In Greece, modern contraceptive methods are used on a limited scale. This study aimed to investigate the knowledge as well as the practice of contraception among female medical students in Greece. Study design Knowledge and practice of contraception of 102 female graduating medical students were assessed with a self-administered, anonymous questionnaire. Results Most students were using condoms as the only contraceptive method (45.1%) and 16.7% were not applying any contraceptive method at all. Oral contraceptives were used as only contraceptive means by 4.9% of the students and in combination with condoms by another 4.9%. Condoms were thought to be the most effective contraceptive method available by 28.4% of the students, whereas 4.9% responded that they did not consider any contraceptive method to be effective. Only 55.9% of the students had ever asked their gynaecologist about contraception. Conclusion Much more time should be spent in teaching contraception in the Greek medical schools to ensure the delivery of adequate family planning guidance by future practitioners.


Human Reproduction | 2015

Corifollitropin alfa compared with follitropin beta in poor responders undergoing ICSI: a randomized controlled trial

Efstratios M. Kolibianakis; Christos A. Venetis; Julia K. Bosdou; Leonidas Zepiridis; Katerina Chatzimeletiou; Anastasios Makedos; S. Masouridou; S. Triantafillidis; A. Mitsoli; Basil C. Tarlatzis

STUDY QUESTION Does substituting 150 µg corifollitropin alfa for 450 IU follitropin beta during the first 7 days of ovarian stimulation in proven poor responders, result in retrieval of a non-inferior number (<1.5 fewer) of cumulus oocyte complexes (COCs)? SUMMARY ANSWER A single s.c. dose of 150 µg corifollitropin alfa on the first day of ovarian stimulation, followed if necessary, from Day 8 onwards, with 450 IU of follitropin beta/day, is not inferior to daily doses of 450 IU follitropin beta. The 95% CI of the difference between medians in the number of oocytes retrieved was -1 to +1 within the safety margin of 1.5. WHAT IS KNOWN ALREADY Recent data from retrospective studies suggest that the use of corifollitropin alfa in poor responders is promising since it could simplify ovarian stimulation without compromising its outcome. STUDY DESIGN, SIZE, DURATION Seventy-nine women with previous poor ovarian response undergoing ICSI treatment were enrolled in this open label, non-inferiority, randomized clinical trial (RCT). PARTICIPANTS/MATERIALS, SETTING, METHODS Inclusion criteria were: previous poor response to ovarian stimulation (≤4 COCs) after maximal stimulation, age <45 years, regular spontaneous menstrual cycle, body mass index: 18-32 kg/m(2) and basal follicle stimulating hormone ≤20 IU/l. On Day 2 of the menstrual cycle, patients were administered either a single s.c dose of 150 µg corifollitropin alfa (n = 40) or a fixed daily dose of 450 IU of follitropin beta (n = 39). In the corifollitropin alfa group, 450 IU of follitropin beta were administered from Day 8 of stimulation until the day of human chorionic gonadotrophin (hCG) administration, if necessary. To inhibit premature luteinizing hormone surge, the gonadotrophin releasing hormone antagonist ganirelix was used. Triggering of final oocyte maturation was performed using 250 µg of recombinant hCG, when at least two follicles reached 17 mm in mean diameter. MAIN RESULTS AND THE ROLE OF CHANCE The number of COCs retrieved was not statistically different between the corifollitropin alfa and the follitropin beta groups [Median 3 versus 2, 95% CI 2-4, 2-3, respectively, P = 0.26]. The 95% CI of the difference between medians in the number of oocytes retrieved was -1 to +1. A multivariable analysis adjusting for all the potential baseline differences confirmed this finding. No significant difference was observed regarding the probability of live birth between the corifollitropin alfa and the follitropin beta group (live birth per patient reaching oocyte retrieval: 7.9 versus 2.6%, respectively, difference +5.3%, 95% CI: -6.8 to +18.3). LIMITATIONS, REASONS FOR CAUTION The present study was not powered to test a smaller difference (e.g. 1 COC) in terms of COCs retrieved as well as to show potential differences in the probability of pregnancy. Moreover, it would be interesting to assess whether the continuation of stimulation in the long acting FSH arm, where necessary, with 200 IU instead of 450 IU of follitropin beta would have altered the direction or the magnitude of the effect of the type of FSH, observed on the number of COCs retrieved. WIDER IMPLICATIONS OF THE FINDINGS Corifollitropin alfa simplifies IVF treatment because it is administered in a GnRH antagonist protocol and replaces seven daily FSH injections with a single one of a long acting FSH without compromising the outcome. It could greatly reduce the burden of treatment for poor responders and this deserves further investigation.

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Dive into the Leonidas Zepiridis's collaboration.

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Theodoros Theodoridis

Aristotle University of Thessaloniki

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J. Bontis

Aristotle University of Thessaloniki

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Basil C. Tarlatzis

Aristotle University of Thessaloniki

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Konstantinos Dinas

Aristotle University of Thessaloniki

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Grigoris F. Grimbizis

Aristotle University of Thessaloniki

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Efstratios M. Kolibianakis

Aristotle University of Thessaloniki

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Christos A. Venetis

University of New South Wales

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Georgios Mavromatidis

Aristotle University of Thessaloniki

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Julia K. Bosdou

Aristotle University of Thessaloniki

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Menelaos Zafrakas

Aristotle University of Thessaloniki

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