If you believe every human has the right to life.
I would propose that the most reasonable place to select that life begins is at conception. Any other argument seems to be an obfuscation of what any person would be perfectly reasonable to conclude is the begining of life (conception), and thus and arbitrary belief, likely lead by their belief in allowing people to have abortions.
Even in the case they you don't see conception as the begining of life, it would be necessary to determine when this human has the right to life, which is shared by all humans, and not take the responsibility lightly and then vigorously propose that these innocents not be murdered.
Many feminists, today, avoid this issue altogether, simply by proposing that pregnancy amount to sexism, and therefore some sort of subjugation, which cannot be fixed in any other way than abortion. Which avoids a discussion of the other, more basic problem, that killing innocent humans is always murder, and is pointing to other societal problems other than babies.
And, of course, this pragmatic approach causes them to ignore the basic problems, by covering over the problem by killing humans. Or perhaps you would call it possibly killing humans according to their philosophy which does not generally take on the argument, it simply asserts the necessity of their control over it... which could easily be called unjust subjugation of the unborn, or a type of discrimination of persons, here, based on age.
That should be plenty to help you understand the issue and take a position.
