Research staff and students

The Laboratory of Reproductive Biology is headed by Senior Scientist Stine Gry Kristensen. The laboratory comprises two senior scientists, one scientist, five PhD students, two laboratory technician, and numerous bachelor and master students.

​Stine Gry Kristensen, Senior Scientist​​​​​

Dr. Stine Gry Kristensen is a senior scientist and head of the Laboratory of Reproductive Biology at the University Hospital of Copenhagen in Denmark. She has a Master of Science in Biology and a Ph.D. in Health and Medical Science from the University of Copenhagen. Her primary area of interest is fertility preservation in girls and young women, and she have extensive experience with cryopreservation of human ovarian tissue being part of the Danish Fertility Preservation Program for more than 14 years. Current positions include basic science officer in the ESHRE SIG on Fertility Preservation and Executive Board member of ReproUnion. 

Dr. Kristensen’s research is focused on human follicle development and the regulatory mechanisms underlying early folliculogenesis, development of 3D culture systems for isolated follicles, and optimizing follicle survival in transplanted frozen-thawed ovarian tissue.


Phone: (0045) 35457080

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Linn Salto Mamsen, Senior Scientist

Linn Salto Mamsen holds a Cand. Scient. in Human biology and Ph.D. in human fetal gonadal development. She is Senior Researcher at the Laboratory of Reproductive Biology at the University Hospital of Copenhagen, Denmark.  She is part of the Danish Fertility Preservation Program of human ovarian and testicular tissue and have worked with fertility preservation, restoration, reproductive endocrinology, and fetal gonadal development for more than 13 years. She is Member of the Fertility Restoration Consortium ( and is involved in the Clinical Academic Group (CAG) in Regenerative Medicine for Urogenital Surgery and Fertility (SURF). Linn is editor on the Reproduction section of Frontiers in Endocrinology (IF 6.05). Her research focus on human ovarian and testicular cryopreservation and fertility restoration, human fetal gonadal development, and human fetal exposure to environmental chemicals.


Phone: (0045) 35455830  

Jesús Cadenas, Researcher

Dr. Jesús Cadenas is a researcher at the Laboratory of Reproductive Biology, University Hospital of Copenhagen, Denmark. His research focuses on advancing our understanding of the regulation of human oocyte maturation and developing a platform able to efficiently sustain human oocyte maturation in vitro (known as IVM) using immature oocytes retrieved from the surplus ovarian medulla tissue of patients having ovarian tissue cryopreserved for fertility preservation. Also, he is involved in developing culture systems for human preantral follicles aiming to reproduce ovarian function in vitro, including the production of competent oocytes and continued hormone production.


Hanna Ørnes Olesen, PhD Student

Hanna Ørnes Olesen is a PhD student at Laboratory of Reproductive Biology. She first joined in 2018 for her masters to study the effects of antioxidants on cryopreserved and transplanted ovarian tissue. Her master was in Cell Biology and Physiology at University of Copenhagen. She is now continuing her work with antioxidants, and also investigating the revascularization process and different treatment administration routes. Her goal is to improve the outcomes after cryopreservation and transplantation of ovarian tissue for the fertility preservation patients. Her PhD project is founded by RegionH, and she is expected to hand in the start of 2024.


Cristina Subirán Adrados, PhD Student 

Cristina Subirán Adrados is a PhD student at the Laboratory of Reproductive Biology at the Copenhagen University Hospital. She obtained her bachelor’s degree in biotechnology from the University of Barcelona and her master’s degree in Stem Cell Biology from the Technical University of Dresden. Her research at LRB focuses on female fertility preservation, specifically she is working with human and mouse follicle culture and optimization of human ovarian tissue transplantation. Her PhD project is part of European collaboration ETN under the Marie Skłodowska Curie actions called EUROVA, a multi-disciplinary project in the field of oocyte biology aiming to foster European cooperation and innovation.​


Lea Bejstrup Jensen2, PhD Student

Lea Bejstrup Jensen, MSc in cell biology and physiology, is a PhD fellow at the Laboratory of Reproductive Biology at the University Hospital of Copenhagen in Denmark. Her PhD grant is funded by the Novo Nordisk Foundation, and she is expecting to hand in her thesis in the summer of 2025. She has more than 2 years of experience as a clinical embryologist, and she is still working as a consultant in an IVF laboratory next to her current and main position as a PhD fellow. She is participating in the team for cryopreservation of human ovarian tissue as a part of the Danish Fertility Preservation Program.  Her primary area of interest is steroidogenesis, bioengineering of ovarian cell constructs, Cell-based Hormone Replacement Therapy (cHRT), preservation of biological hormone function and regulation in premenopausal women. Her PhD project is a collaboration between Wake Forest University Hospital, North Carolina in the USA and the University Hospital of Copenhagen. 


Malene Louise Johannsen, PhD Student

Malene Louise Johannsen is a PhD student at the Laboratory of Reproductive Biology at the University Hospital of Copenhagen in Denmark and has a background in pharmacy. Her research is focused on the isolation and characterization of theca and granulosa cells from women to pinpoint potential mechanism involved including the analysis of the human follicular steroidogenesis using LC-MS/MS, primary culture set-up and single cell RNA-sequencing. Furthermore, her research includes to examine the steroidogenesis in follicular fluid across the preovulatory period in women undergoing fertility treatment.


Mengxue Zheng, PhD Student

Mengxue Zheng is a PhD candidate in the Faculty of Health and Medical Sciences at the university Copenhagen. She has joined the Laboratory of Reproductive Biology at the University Hospital of Copenhagen in Denmark since 2019. She holds a medical degree and is an obstetrician-gynaecologist in China. Her current research interests focus on the growth and development of follicles in vivo and vitro, as well as ovarian steroidogenesis.


Marjo Westerdahl, Bioanalyst

Marjo Westerdahl is a bioanalyst who joined the Laboratory of Reproductive Biology in 2007. She graduated in Eindhoven, Holland, in 1982. From 1988 to 1995 she settled in Norway, where she worked at Section for Clinical Pharmacology and Toxicology, Center of Biotechnology, and Nycomed Pharma. In 1995 she continued her career at the Finsen Laboratory, Rigshospitalet, Denmark, where she obtained extensive knowledge of sterile work, cell culture and biochemical analysis, including hormone assays. At LRB Marjo has specialized in stem cell culture, ELISA and cryopreservation of ovarian tissue. She is also responsible for the training of new students in the laboratory.


Phone: (0045) 35455826 

Marianne Holmberg Sguazzino, Histology Technologist

Marianne got her authorization as a histology -/cytology technologist in 1995. After 20 years of experience in histological processing and immunohistochemical analysis, working in pathology, she joined the Laboratory of Reproductive Biology in February 2015. She is responsible for the daily work within histology and the training of new students in the laboratory.