No, you cannot have a miscarriage in The Sims.
The Sims games do not simulate the biological complexities of pregnancy, including miscarriages. They focus on the social and emotional aspects of raising a family within a virtual world.
While the game allows players to experience the joys and challenges of parenthood, including pregnancy and childbirth, it does not include the possibility of miscarriages.
The Sims games are designed to be family-friendly and do not depict sensitive or potentially upsetting events like miscarriages.