Trying for Baby. Pregnancy does not magically happen, they need to try for a baby. There are three different places Sims can try to get pregnant, they are: the bed, hot tub, and clothing booth. Just because they try for a baby, does not mean that the woman will become pregnant. There is a 60% chance in the bed, 50% chance in the clothing booth (public woohoo), and 25% in the hot tub. . Trying on the Bed. To try for a baby on the bed, you have to have a male and female sim relax on a bed together. The option to 'try for baby' or 'woohoo' will show up. Choose 'try for baby' if you wish your Sim to have a baby. . . If you listen closely after 'trying for baby' you will hear a lullaby afterwards. You can have both relax on the bed and see if the 'try for baby' option shows up. If it doesn't, then your Sim is pregnant.