I was a full-time grad student at the time I had to make this decision. I became pregnant with my only child, a son. I was terribly close to getting my Master's degree, but I had only the Thesis to finish-all the class work had been completed.
The challenge I faced at that juncture in my life was letting go of the Master's degree and staying home with a newborn. I chose my newborn.
At this point in my life I may decide to try and get that degree after all, since I was so very close. But I am 55+ now and am not sure I have the energy or time!
Great question, J.S.!