Single Sperm Vitrification is a specialized technique offered at 9M Fertility as part of our fertility services. This technique is used to preserve individual sperm cells for use in future in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI) procedures. Single sperm vitrification is a specialized technique offered at 9M Fertility as part of our fertility services. This technique is used to preserve individual sperm cells for use in future in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI) procedures.