The Effects of Two Different Freezing Method on Survival and Development of Pronuclear Stage Human Embryos

Abstract

Human embryo cryopreservation is widely used in ART Programs, as it allows embryos to be stored without deterioration until needed [1]. Human pronuclear stage embryos (2PN) are routinely crupreserved by use of slow controled-rate freezing procedure. This method requires expensive equipments and longtime [2]. A simpler, quicker and less expensive alternative to