In this era, what difference does this make? The doc or pregnancy reports, and you {the mom} decide. Isn't that the hallmark of the pro-choice movement? Women get to "choose" if they want to be pregnant or not, or be kinda pregnant.
Since the "choice" is all in their head, pregnancy has now run the same esoteric circle that our culture has beeing sprinting toward: Pregnancy is a mental decision. 'Tis it. No more; no less.
Doc or the pregnancy test reports, and you decide if it's a blob of tissue or a baby...if it's an acorn or human offspring...if it's trash on the heap or to be valued according to whatever sanctity you wish to accord it or him or her or whatever floats your boat.