When to tell our parents?

Alli • Grace 10-8-18 ❤️❤️

I’m trying to decide when to tell our families. I’m about 6 weeks but will figure out for sure at my first ultrasound on feb 19. I’d also kinda like to be able to include an ultrasound pic in our announcement to them but I kinda wanna do it sooner. My other thing is, I’d be happy to announce to my family now as if anything were to happen, I would love their support. But, I don’t want to tell his family quite yet as I don’t think I’d be comfortable letting them know if something happened. My sister already knows (she’s my best friend and knew I was going to get blood work done to confirm it so she figured it out) so I just don’t know when to tell the rest. Any ideas are welcome