The GHM-ONE is based on a powerful processor which, in combination with a relay card and mains adapter card, serves as the base unit. The base unit can be adapted to applications with a communications card and up to two I/O cards. The number of physical inputs and outputs can be expanded with external I/Oâs. This modular layout enables
Some practitioners routinely recommend an ultrasound at 6 to 9 weeks to confirm and date the pregnancy, but others will only do one if they have reason to suspect any of the following:
1 During the first trimester, ultrasounds are often done through the vagina with a specially designed probe and can provide better images. 2  An ultrasound takes 15 to 20 minutes. 3  While not 100 percent accurate, ultrasounds can pick up most serious birth defects or problem pregnancies.