Facebook announcements

Imogen • My baby girl due Sept 3rd 🎀
When did u guys Facebook announce your pregnancy. 
I'm 7+5 and due to the hospital thinking I was ectopic I have had 2 scans. They have shown growth and a heartbeat and the hospital signed it off as fine. 
I now want to FB announce but my partner wants to wait until 12 weeks 
Ideas?