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:
In the first trimester of pregnancy (weeks one to 12), ultrasounds may be done to: 1  confirm pregnancy. 2  check the fetal heartbeat. 3  determine the gestational age of the baby and estimate a due date. 4  check for multiple pregnancies.