What would be a good greeting to a non-religious expecting mother?

Next week it's my friend's b-day and she's currently 7 weeks pregnant. I'm going to buy her a gift but also post a good greeting to her.

Instead of the typical ''A baby is a blessing from god, may the lord, etc'' thing (she's really atheist), what would be another good greeting for a non-believer, expecting mother? Any ideas?

What would be a good greeting to a non-religious expecting mother?
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