From The Sims Wiki, a collaborative database for The Sims series
This is an old revision of this page, as edited by 71.171.119.152(talk) at 00:38, 28 February 2011. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
If the pregnancy is left alone, the baby tends to be 90% of the time a boy, and resemblance his mother. If the game is left on free-will, a divorce is likely to happen between she and Marty, leading their baby to inherit bad traits, most commonly Evil and Grumpy trait, but if marriage is well, he will grow up as an average child, with great traits.
Trivia
It should be interesting to note that her maternity clothing is the same as the female cab driver's outfit