Transvaginal oocyte retrieval (TVOR), also referred to as oocyte retrieval (OCR) or even simply egg collection, is a technique used in in vitro fertilization (IVF) in order to remove oocytes from the ovary of the female, enabling fertilization outside the body. Transvaginal oocyte retrieval can be called transvaginal ovum retrieval if the oocytes have matured into ova, as is normally the case in I...