In fact, there are dozens of YouTube videos that I click on, don't like them and then close the window (I see other people writing negative comments in poor English but I doubt that helps either).

One tweak would be to shift the start of the seven-day window for filling a prescription filled to the day of the negative pregnancy test.

For rectangular window FFT interpolation algorithm, the negative frequency components of harmonic components have a greater impact on the fundamental calculation error.