How Do They Date A Pregnancy Scan : Pregnancy Ultrasound Scans In 1st 2nd 3rd Trimester - Known as the pregnancy hormone, hcg is only found in pregnant women.1 x research source home pregnancy tests are available at most drug stores and online. How Do They Date A Pregnancy Scan : Pregnancy Ultrasound Scans In 1st 2nd 3rd Trimester - Known as the pregnancy hormone, hcg is only f... Visit Site