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Robert Najdecki | MD, PhD

Co-Founder, Scientific Director


Robert Najdecki  MD, PhD is  a Reproductive Gynaecology Specialist. His experience in diagnosis and treatment of fertility disorders, such as endoscopic surgery is long and extensive and includes more than 6000 stimulated cycles.

He graduated and received his medical degree from Medical School at the University of Warsaw in 1985 and his residency training in obstetrics and gynecology at Solec University Hospital in Warsaw. He completed the reproductive endocrinology and infertility fellowship at The Genetic Department of Children’s Memorial Health Institute in Warsaw – Poland as a member of the IVF team in 1992. One of the most important achievements of his team/ led by Prof. Wisniewski / was the second baby birth through IVF technique in Poland.In 1989, he obtained his PhD in the University of Warsaw, with his dissertation titled “Evaluation of maturity of oocytes after stimulation through IVF method.” His dissertation includes studies of multiple medication protocols in order to induce ovulation, regarding the morphological maturity in human oocytes after collection. As a reproductive gynaecologist, he finds this experience in embryology to be a very crucial in the process of improving patients care. During these pioneering years, Dr. Najdecki was deeply involved in research for a “new method” for oocyte pick up. After many years of laparoscopic OPU, he successfully introduced the first vaginal, ultrasound guided oocyte pick up, which resulted in second IVF baby being born in the nation.This first success led the way to a new era in IVF techniques that goes on until today. He has also been active in fertility research, publishing on topics ranging from fibroids, endometriosis to ovulatory dysfunction and ovarian ageing.

After moving to Greece Dr Najdecki was appointed Scientific Director of “Iatriki Erevna” IVF Unit / Medical Research/Clinic in Thessaloniki (1988 – 2005). In  2005  Dr Najdecki joined the clinical team at “Embryolab” IVF Unit in Thessaloniki and spent 8 years supporting the team in egg collections, embryo transfers and endoscopic surgeries.


From 2013, Dr Najdecki is a founding partner, scientific director of Assisting Nature Assisted Reproduction Unit in Thessaloniki. In addition to his clinical practice, Dr Najdecki supervises the extensive research activities and academic ventures of the practice and he is currently holding the position of QMS director of the Unit.

Many years of intensive clinical practice and academic research have shown him the limitations of conventional IVF. He is not only a strong advocate of minimal stimulation IVF protocols (Natural, Minimal, UltraMini-IVF,) for indicated patients but is an accomplished surgeon for minimally invasive procedures as well. Dr.Najdecki still actively continues his clinical research and educational activity in the field of advanced office hysteroscopy for reproductive patients. At the same time, he is constantly pursuing the development of new medical devices, novel medications, and advanced diagnostic approaches.

Robert Najdecki is an active member of the European Society of Human Reproduction and Embryology (ESHRE) and the American Society for Reproductive Medicine (ASRM).

During his career, he has published over 25 scientific papers. He has led several large research studies and contributed to publications in top peer-reviewed fertility journals, including Fertility and Sterility and Human Reproduction.

In addition, he has appeared as guest speaker at numerous scientific meetings and conferences.

Current Research Interests

Dr Najdecki research interests include diminished ovarian reserve and AMH relationship, GnRh Triggering, Antagonist stimulation protocols, Office advanced Hysteroscopy for infertile patients, QMS in IVF Units, single embryo transfer, fertility preservation, preimplantation genetic diagnosis (PGD).

Scientific publications, presentations, papers:

  1. Peitsidis, N., Tsakiridis, I., Najdecki, R., Michos, G., Kalogiannidis, I., Athanasiadis, A., Papanikolaou, E. (2024). ‘Hysteroscopic endometrial fundal incision versus hysteroscopy only in oocyte recipients: A randomized controlled trial assessing the reproductive outcomes’, International Journal of Fertility and Sterility, (), pp. -. doi: 10.22074/ijfs.2024.2009369.1523
  2. Timotheou E., Chartomatsidou T., Kostoglou K., Kakani O., Galiotou M., Chouliara F., Najdecki R., Papanikolaou EG., Christopikou D. Neonatal health outcome of offspring born after Preimplantation Genetic Testing for aneuploidies (PGT-A) in IVF, 15th Congress of the European Society of Gynecology, Nov29-Dec2 2023, Amsterdam, Netherlands
  3. Najdecki R, Peitsidis N, Tsakiridis I, Michos G, Timotheou E, Chartomatsidou T, Athanasiadis A, Papanikolaou E. Hysteroscopic Endometrial Fundal Incision in Oocyte Recipients before Embryo Transfer May Improve Reproductive Outcomes: A Prospective Study. Int J Fertil Steril. 2023 Nov 7;18(1):40-44. doi: 10.22074/ijfs.2023.560746.1354. PMID: 38041458; PMCID: PMC10692741.
  4. Peitsidis N, Tsakiridis I, Najdecki R, Michos G, Chouliara F, Timotheou E, Chartomatsidou T, Athanasiadis A, Papanikolaou E. Diagnostic hysteroscopy with endometrial fundal incision may improve reproductive outcomes in oocyte recipients after implantation failure. JBRA Assist Reprod. 2023 Nov 14;27(4):689–93. doi: 10.5935/1518-0557.20230037. Epub ahead of print. PMID: 37962971; PMCID: PMC10718553.
  5. Peitsidis N, Tsakiridis I, Najdecki R, Michos G, Chouliara F, Zachomitros F, Kalogiannidis I, Athanasiadis A, Papanikolaou E. Hysteroscopic Identification of Intrauterine Pathology in Oocyte Donation Cycles: A Retrospective Study. Cureus. 2023 Apr 12;15(4):e37470. doi: 10.7759/cureus.37470. PMID: 37187651; PMCID: PMC10176530.
  6. Papanikolaou E, Peitsidis N, Tsakiridis I, Michos G, Skalias A, Patoulias D, Poutoglidis A, Mamopoulos A, Athanasiadis A, Grimpizis G, Najdecki R. Endometrial scratching during hysteroscopy in women undergoing in vitro fertilization: a systematic review and meta-analysis. Front Surg. 2023 Sep 19;10:1225111. doi: 10.3389/fsurg.2023.1225111. PMID: 37795147; PMCID: PMC10546045.
  7. Timotheou E, Chartomatsidou T, Kostoglou K, Katouna A, Christopikou D, Najdecki R, Papanikolaou E. Implantation failure with egg donation after multiple failed IVF cycles with own oocytes; Is it necessary to perform PGT-A?, 19th IAHR World Congress 15-18 March 2023, Venice, Italy.
  8. Najdecki R, Michos G, Peitsidis N, Timotheou E, Chartomatsidou T, Kakanis S, Chouliara F, Mamopoulos A and Papanikolaou E (2022) Agonist triggering in oocyte donation programs—Mini review. Front. Endocrinol. 13:838236. doi: 10.3389/fendo.2022.838236.
  9. Kostoglou K, Chartomatsidou T, Papa E, Chouliara F, Kallintzi M, Timologou A, Papanikolaou E, Najdecki R, Timotheou E. Cumulative live birth rates in egg donation regarding the origin of oocytes (fresh or cryopreserved oocytes) in unsynchronized cycles. ESHRE Annual Meeting 2022 (poster presentation)
  10. Timotheou E, Chartomatsidou T, Kostoglou K, Papa E, Ioakeimidou C, Najdecki R, Papanikolaou E. The correlation of first cleavage and blastulation timing to the euploid status of embryos after PGT-A. ESHRE Annual Meeting, 2021 (poster presentation)
  11. Najdecki R, Papanikolaou E, Chartomatsidou T, Pakaki F, Stamataki S, Tatsi P, Timotheou E,  Chouliara F, Bampas E, Bouchlariotou S, Michos G, Athanasiadis A. Hysteroscopic Fundus Endometrial Incision (FEI) in oocyte recipients before embryo transfer (ET) during In Vitro Fertilization. ESHRE Annual Meeting, 2020 (oral presentation)
  12. Papanikolaou E, Najdecki R, Chouliara F, Tatsi P, Chartomatsidou T , Pakaki F, Stamataki S , Ioakeimidou C, Timologou A, Vlachou C, Diamantopoulos A, Virgiliou A, Kaminski P, Athanasiadis A, Timotheou E. Post Implantation failure diagnostic Hysteroscopy with Endometrial Fundus Incision (FEI) might improve pregnancy outcome in oocyte recipients. ESHRE Annual Meeting, 2020 (poster presentation)
  13. Tatsi P, Chartomatsidou T, Papanikolaou E, Najdecki R, Chouliara F, Asuchidou I, Ioakeimidou C,  Timotheou E. The impact of Vitrification in the outcome of IVF in an oocyte donation program. ESHRE Annual Meeting, 2020 (poster presentation)
  14. Davies S, Christopikou D, Kallioras N, Tsakalis P, Tsorva E, Zaxaria S, Economou K, Najdecki R, Timotheou E, Tatsi P, Chartomatsidou T, Papanikopoulos E, Lagaros N, Mastrominas M, Papanikolaou E. Applied machine learning based on time-lapse technology and reproductive history data designed for pre-implantation embryo ploidy prediction. ESHRE Annual Meeting, 2020 (poster presentation)
  15. Papanikolaou E, Timotheou E, Tatsi P, Chartomatsidou T, Asouchidou I, Grynberg M, Vlachou C, Katsoula E, Najdecki R. Long-Antagonist protocol versus Classical-day-6 Antagonist. Single luteal use of long-acting GnRH-antagonist Degarelix can efficiently downregulate LH during ovarian stimulation for IVF achieving comparable pregnancy outcome. ESHRE Annual Meeting, Vienna 2019 (oral presentation)
  16. Najdecki R, Choulaira F, Timotheou E, Tatsi P, Chartomatsidou T, Asouchidou E, Pakaki F, Bouchlariotou S, Humaidan P, Papanikolaou E. Single follicular degarelix, a new long acting GnRH-antagonist for LH surge suppression during ovarian stimulation in oocyte donors. A randomised controlled trial. ESHRE Annual Meeting, Vienna 2019 (oral presentation)
  17. Timotheou E, Chartomatsidou T, Tatsi P, Katsoula E, Vlachou C, Stamataki S, Asouchidou I, Zafeiratis O, Najdecki R, Papanikolaou E. Cumulative Live Birth Rates (CLBR) in patients following Freeze-all policy are higher compared to patients who undergo fresh embryotransfer (ET) followed by frozen-thawed embryotransfers. ESHRE Annual Meeting, Vienna 2019 (poster presentation)
  18. Papanikolaou E, Chartomatsidou T, Timotheou E, Tatsi P, Katsoula E, Vlachou C, Asouchidou I, Zafeiratis O, Najdecki R. In Freeze-All Strategy, Cumulative Live Birth Rate (CLBR) Is Increasing According to the Number of Blastocysts Formed in Women <40 Undergoing Intracytoplasmic Sperm Injection (ICSI). Front Endocrinol. 2019; 10 (427) https://www.frontiersin.org/articles/10.3389/fendo.2019.00427/full
  19. Papanikolaou EG, Timotheou E, Tatsi P, Janssens H, Grynberg M, Athanasiadis A, Zafeirati C, Najdecki R, Petousis S. COMFFETI, Combined Fresh and Frozen Embryo Transfers per Indvidual: A New Index of Quality Control for the Performance of Embryologic Labs in The Emerging Era of Segmentation of Cycle and Freeze- All Strategy. Int J Fertil Steril. 2019; 12(4): 339-342 https://www.ncbi.nlm.nih.gov/pubmed/30291697
  20. Papanikolaou EG, Yarali H, Timotheou E, Grynberg M, Zafeiratis O, Tournaye H and Najdecki R. A Proof-of-Concept Clinical Trial of A Single Luteal Use of Long-Acting Gonadotropin-Releasing Hormone Antagonist Degarelix in Controlled Ovarian Stimulation for In Vitro Fertilization: Long Antagonist Protocol. Front. Endocrine. 2018. 9:25. doi: 10.3389/fendo.2018.00025     https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5839166/
  21. Papanikolaou EG, Yarali H, Timotheou E, Tatsi, P, Chartomatsidou T, Grynberg M, Zafeiratis O, Vlachou C, Tournaye H  and Najdecki R. Long-Antagonist protocol; single luteal use of long-acting GnRH-antagonist Degarelix can efficiently downregulate LH during ovarian stimulation for IVF. A proof of concept. ESHRE Annual Meeting, Barcelona 2018 (Award nominee)
  22. Chartomatsidou T, Timotheou E, Tatsi P, Katsoula E, Zafeiratis O, Najdecki R, Papanikolaou E. In Freeze-all strategy Cumulative Live Birth Rate (CLBR) is increasing according to the number of blastocysts formed in women <40 undergoing Intracytoplasmic Sperm Injection (ICSI). ESHRE Annual Meeting, Barcelona 2018
  23. Papanikolaou E, Timotheou E, Tatsi P, Chartomatsidou T, Najdecki R. Long-Antagonist protocol; luteal administration of a single dose of Degarelix (long-acting GnRH-antagonist) for controlled ovarian stimulation. A new protocol for IVF. ASRM Scientific Congress & Expo, Denver, Colorado, 2018
  24. Papanikolaou E. and Najdecki R. Role of Antagonists in human IVF: The tool for a safer and more patient friendly IVF. Handbook of In Vitro Fertilisation. 4th Edition. 2017. Edited by DK Gardner and C Simon. CRC Press
  25. D.Kyrou, R.Najdecki, E.Pagou, E.Katsoula, E.G.Papanikolaou. Corifollitropin Alpha combined with GnRh agonist triggering appears to be safe and efficient option in oocyte donation cycles a prospective longitudinal study.Fertility&Sterility 2015:104;325-326
  26. Chatziparasidou A., Elder K., Christoforidis N., Tsakos E., Najdecki R. (2007). “Seminal Plasma infections”. Poster presented at 23rd Annual Meeting, ESHRE. Lyon, France.
  27. Chatziparasidou A., Christoforidis N., Tsakos E., Najdecki R. (2007). “Triplonuclear embryos in ICSI cycles”. Poster presented at 19th World Congress on Fertility and Sterility IFFS. Durban, South Africa.
  28. R.Najdecki ,N.Plachuras, D.Lolis. Prenatal,first-trimester ultrasound detection of foetal chromosomal abnormalities. Polish Ultrasonography 6/3:1996;75-80
  29. Najdecki R., Georgiou I., Lolis D. The thalassemia syndromes and pregnancy – molecular basis, clinical aspects, prenatal diagnosis. Ginekologia Polska (Impact Factor: 0.6). 09/1996; 69(8):664-8.
  30. R.Najdecki, Recent trends K.Karypidis, A. PResent trends in the therapy of vaginal candidiasis. Ginekologia Polska 1994:64:234-236
  31. L.Wiśniewski, A. Grześ, R.Najdecki. Therapeutic problems in the case of Premature Ovarian Failure. Ginekologia Polska 1989;60:9-11
  32. A.Grześ, R. Najdecki. Human placental lactogen in early pregnancy. Human Reproduction 1992:8;183-184
  33. R.Najdecki, A. Grześ.FSH, oestradiol and testosterone level in early pregnancy. Human Reproduction 1992:8;181-182
  34. A.Grześ, R.Najdecki. Ultrasound imaging and hormones in women over age 40. Human Reproduction 1992:8;56-57
  35. L. Wiśniewski, J.Jezuita, R.Najdecki, A.Kaplinski, A.Grześ Use of vaginal ultrasonography for Graafian follicle puncture in vitro fertilisation programme. Symposium on selected problems of pathology of reproduction and early development: Warsaw Poland 1988:32-37
  36. A.Kaplinski, L.Wiśniewski, J.Jezuita, R.Najdecki, A. Grześ, W. Strzyrzewski. Endocrinologic and ultrasonic evaluation of patients with stimulated ovulation for in vitro fertilisation. Symposium on selected problems of pathology of reproduction and early development: Warsaw Poland 1988:17-20
  37. A.Grześ, L.Wiśniewski, J.Jezuita, R.Najdecki, A.Kaplinski. Stimulation model evaluation in vitro fertilisation programme symposium on selected problems of pathology of reproduction and early development: Warsaw Poland 1988:14-16
  38. A.Grześ, R. Najdecki, L.Wiśniewski.The follicle function using USG in the out-patient clinic. Satellite Workshop on IVF, embryo transfer and GIFT: Rhodes Island/ Greece 1988;45-47
  39. A.Grześ, R.Najdecki, A. Strojecka. The application of natamycin in suspension in the treatments of blastomycosis in girls.European Congress of Paediatric and Adolescent Gynaecology: Greece 1988:13-165
  40. A.Grześ, R.Najdecki. The follicle punction using ultrasound scanning to the level of an out-patient clinic. Proceedings of the Symposium; In Vitro Fertilisation und Gametentransfer, Berlin 1988: 200-201
  41. A.Grześ, R.Najdecki. The oocyte recovery by laparoscopy. Proceedings of the Symposium; In Vitro Fertilisation und Gametentransfer, Berlin 1988: 111-112
  42. A.Grześ, R.Najdecki. Hyperstimulation of the ovaries. Proceedings of the Symposium; In Vitro Fertilisation und Gametentransfer, Berlin 1988: 77-78
  43. L.Wisniewski, J.Jezuita, E.Piontek, A. Grześ, R.Najdecki. The IVF Programme in the Memorial Child Health Hospital in WarsawHuman Reproduction 1988:833
  44. L.Wisniewski, R.Najdecki. The oocyte after stimulation in the IVF programme. Human Reproduction 1987:720
  45. R.Najdecki, K.Maternicka, U.Bolesta. An assessment of the oocyte in the IVF programme. In Vitro Fertilisation Symposium, Warsaw, Poland 1987, Abstract Book 91-92
  46. A.Grześ, R.Najdecki, Z.Bogoniowska, S.Mirowski. Hormonal parameters in the menstrual cycle assessment. Ginekologia Polska  10/1987;58:49-51
  47. A.Grześ, R.Najdecki, Z.Bogoniowska, S.Mirowski. Studies on the interrelations between hormones of the I and II phase of the 28-day menstrual cycle. Ginekologia Polska 09/1987;57:1