When planning a baby shower, it’s crucial to send out invitations at the right time. Ideally, invitations should be mailed 6-8 weeks before the event to give guests ample time to RSVP and make arrangements. The ideal time frame for sending invitations is during the second trimester, around 18-22 weeks of pregnancy, when the expectant mother is feeling well and the pregnancy is well-established. Early invitations allow guests to save the date and avoid potential schedule conflicts.