Usually people won't discover a pregnancy until they are more than a few cells in development. But I understand the meaning. Early development of an embryo can hardly be medically called a person. It hasn't reached the fetal stage. Reasonable stand to take.
But abortion is never really about biological facts but rather moral stances of society on said biological facts. What I consider the start of a life compared to you will differ drastically. I view it as life as soon as a person comes into knowledge of the pregnancy. The stages of the development are merely biological realities. To you it might be the second or third trimester where the organs are well developed.
Abortion is always a difficult topic to unravel. There is no binary solution to it. Neither would I want to have a yes or no answer for it. Life is full of nuance and no two situations are identical. Abortion is like a tool amoral. Who and how it is used is the limitations to the tool.
I'm not in support of a total ban either. I would however not give the unrestricted choice to women alone. There must be proper conditions to request for one. What I came to learn from keeping up on American events is that there are advocates that wanted late term abortion even to the point of near birth. All in the name of bodily autonomy. I find it morbidly wrong.
But that is just me.