Putting aside obfuscation about women's right's etc, I think we can all agree that human life deserves the protection of law and that murder is wrong. Therefore, there is only one real issue in question here, when does a human life begin?
I'm not a religious fundamentalist. My opposition to abortion is rooted in science and logic, not faith or dogma. Therefore I don't know for certain that life begins at conception. But I'm pretty sure that human life doesn't begin at the moment of birth. We'd all object to a woman having an abortion 1 hour before scheduled to give birth right? So we can perhaps agree to a common ground that human life begins sometime between conception and birth, but we don't know exactly when. This being the case, isn't it wise in the face of uncertainty, to err on the side of preserving life? You wouldn't take a revolver and play russian roulette with a newborn baby, but unless you're 100% sure when exactly life begins, thats exactly what abortion is. I guess it comes down to, what percent chance of murdering a child is acceptable to you? 10%? 5%? 1%? 0.1%?
By 3.5 weeks, a primitive spinal cord and brain has already formed and production of human brain cells has begun.
By 5-8 weeks, the fetus has a sense of touch and can move.
By 9-12 weeks, the nervous system is organized, and complex behaviors such as kicking and thumb sucking occur.
By 24 weeks, every neuron that the unborn child will ever have is present in the brain.
If you're not 100% sure when life begins, is it too much to ask that we err on the side of preserving life?
Wrong. The brain continues to grow new cells at a very high rate (100,000 per day? forgive my imprecision, as it has been 12 years since last I studied this particular topic) for several years after birth. A second process, synaptic pruning and reinforcement, kicks in at around two years and continues at a brisk clip until the age of five.
This statement of yours is false. The information disproving it has been readily available to the lay public for some thirty years. That you could make such an evidently false and self-serving claim once leads me to question the validity of anything else you say in the same vein or topic. I begin to see a need to unpack my developmental biology texts from storage and see where else you might have erred in support of your creed.