Can Sims Have Babies in The Sims (GameCube Version)? No

No. The Sims on Nintendo GameCube (released 2003) is a simplified port of the PC original. Due to hardware limitations and design choices, it omits the pregnancy and baby-raising mechanics entirely.

• Sims can woohoo and get married.
• They cannot try for a baby, become pregnant, or have children.
• The family gameplay loop stops at the couple stage.

If you want generational gameplay, you need the PC/Mac versions (The Sims 1 with expansions, The Sims 2+) or later console entries like The Sims 2 (PS2/Xbox/GameCube) which reintroduced babies and aging.