SOFT is an intermediate procedure of GIFT and PROST. The sperms and oocytes are incubated together for 2-3 hours in the laboratory, at the end of which sperms attached oocytes are transferred into the fallopian tube making sure that the process of fertilization is initiated. This procedure is ideally suited to keep the anonymity of oocyte donor and the recipient since the donor oocytes can be harvested in the afternoon and SOFT procedure on the recipient could be performed early in the evening.