The question of suffering matters a lot. It's not enough to simply demand the right to life, you must also define why, if it is indeed murder, it is unacceptable to terminate a pregnancy. One such way to measure it is the amount of suffering. Since a one month old fetus cannot even perceive pain since it lacks any form of nervous system, we can say that abortion at that stage is of no consequence to the fetus itself who lacks pertinent awareness of what is happening.
Furthermore, this tiny blob of cells doesn't even resemble a person as we know it. You would not want to cuddle with this thing that looks more like a fish, so attributing personhood to it is irrelevant.
If suffering is removed from the equation, then all we are left with is that we should preserve life just because it's life. Well, we see how humans treat life all the time. We kill it, eat it, turn it into furniture or housing, hunt it, etc. Not to mention we engage in wars to kill other humans. So life in of itself has an inconsistent value in our society.