I see, so at its core you are referring to the person hood argument as garbage. This is a common direction in these debates.
You likely understand the cellular mass to be a Human Person and thus due some level of rights, regardless of the fact it is incapable of the basic criteria used to define a human person. Though I respect your freedom to hold that opinion, I disagree with it based on science and logical thought.
This debate is usually something of a brick wall, as many simply refuse to deal in fact rather than emotion. Those who see the value in preserving the unformed Human are adamantly Pro-Life (though I question the term), those who value the life of the woman tend to be pro-choice.