I had an ultrasound at 5 weeks (just showed gestational sac) then again at 6 weeks 5 days with a HR of 137 then again yesterday at 8 weeks 6 days with a HR of 174. I am nine weeks today. How much longer should I wait? I have the CUTEST announcement pictures & want to post them so badly but I also don't wanna jump the gun.... I'm torn. I read online that a detectable heartbeat at 6 weeks increases the viability to 78% then a heartbeat at 8 weeks increases up to 98% not sure if this is true.