Baby Bubble is 0.75 cm long which correlates to 6 weeks 5 days - so she's gonna be tall for her age like Mom and Dad :)
Williams's first ultrasound was at 6 weeks 0 days and is available at the link below if you'd like to compare early ultrasounds: kzfaq.info/get/bejne/aregibKKnbeUpqM.html