Medical Tab Banner

We love the tab banner for an at a glance view of all of our female patients, but the EGA on the medical tab banner calculates the EGA for negative tests. The EGA (& EDD) should only populate for those with positive tests. I wonder if the EGA can be calculated in the template in the same way the EDD is. That way we can enter the LMP on all our female patients without the EGA populating for negative pregnancy tests.