Source:http://linkedlifedata.com/resource/umls/id/C0015914
MSH: The fusion of a spermatozoon (SPERMATOZOA) with an OVUM thus resulting in the formation of a ZYGOTE.,CSP: fusion of a spermatozoan with an ovum resulting in the formation of a zygote.,GO: The union of gametes of opposite sexes during the process of sexual reproduction to form a zygote. It involves the fusion of the gametic nuclei (karyogamy) and cytoplasm (plasmogamy). [GOC:tb, ISBN:0198506732],NCI: The process beginning with penetration of the secondary oocyte by the spermatozoon and completed by fusion of the male and female pronuclei.