Keep the message proportionate
Use the shortest explanation that still tells the truth about the event, impact, and current position. For a message about how to congratulate someone on a new baby, use this factual base: name the milestone and, when you know it, the effort or meaning behind it.
Give timing that can be trusted
Give a realistic date, a simple option, or a direct yes-or-no question and avoid vague promises such as soon. Offer warm recognition and let the recipient decide whether they want a call, visit, gift, or quiet celebration. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Close the loop without drama
Do not make assumptions about pregnancy, money, relationships, health, or what the achievement should mean next. Follow the person's lead on privacy before sharing their news or photos with anyone else. A calm ending is more credible than a warning, a grand gesture, or language designed to provoke a response.