If cannot see or hear clearly from abdominal ultrasound, usually gynae will ask to do tvs.. but recommendation is to have gynae appointment after 7-8 weeks? I wanted to have my first appt around 6 weeks but the clinic suggested to come at a later date.
If the fetus cannot be scanned on the abdominal ultrasound, then you need to undergo a transvaginal ultrasound.
TVS is required to check if pregnancy is viable. Don't worry Mummy, TVS is safe and just think positive.