If it was socially acceptable to just text family that is what I would do!
Ha we text all our siblings. We tell grandparents in person but I text my SILs because I know they're done having babies and I want to give them their space when they find out. I remember my friend telling me she was 11 weeks pregnant the DAY I found out I was miscarrying. That was really sucky and I didn't do a good job congratulating her even though I was really happy for them!!