Spock is half-Vulcan and half-human, the son of the Vulcan Sarek and his human wife Amanda, but presents himself as fully Vulcan. ... Instead, Spock's curiosity about the universe led him to join Starfleet.

Is Spock an alien?

Commander Spock (born 2230 on Shi'Kahr, planet Vulcan); full name described as unpronounceable by Humans; is a half-Vulcan, half-Human hybrid; the son of Vulcan diplomat Sarek and Human teacher Amanda Grayson, the half-brother of Vulcan outcast Sybok and foster brother of Michael Burnham.

Did Spock and Saavik have a child?

After her brief appearance in Star Trek IV, Saavik was not canonically seen again. Spock and Saavik having a child together was deleted because, in producer Harve Bennett's words, Nimoy "was always very uncomfortable" about it.