Dr. Sebastiaan Mastenbroek is an Assistant Professor at the University of Amsterdam and one of the Senior Clinical Embryologists of the Center for Reproductive Medicine of the Amsterdam UMC. An important focus of his research has been Preimplantation Genetic Screening (PGS / PGT-A). Publication of his RCT on PGS in the New England Journal of Medicine started a fiercely debated controversy on the use of PGS as it showed that the technique actually lowered pregnancy rates after IVF instead of increasing them. He is an associate editor of Human Reproduction Open, editor of the Cochrane Gynaecology and Fertility Group, chair of the Science Committee of the Dutch Society for Clinical Embryology, board member of the special interest group ART of the Dutch Society of Obstetrics and Gynaecology, board member of the SAF foundation, and board member of the Amsterdam Reproduction and Development Research Institute.
