However, the likelihood of a female adult Sim successfully becoming pregnant when attempting the Try for Baby interaction is somewhat lower than it is for a young adult Sim.If The Sims 3: Generations is installed, adults are slightly more distinct from young adults.
Adult is a life stage existing in The Sims, The Sims 2, The Sims 3 and The Sims 4.
In The Sims 2, it is normally the longest life stage in a Sim's life; in The Sims 3, it is the same length as the young adult stage.
It is preceded by the teen life stage, or the optional young adult stage if The Sims 2: University is installed.
It is the only life stage in which a Sim can get pregnant and get a full-time job.
Consequently, it is fairly difficult for a household to function without adults.