Not one that will ever meet your rigid requirements, which are based on your faith and your sense of moral absolutes, so there isn't much point in going back and forth with you all morning. You look at this question as a faithful Catholic, which is your right to do but not to push onto others who do not share your particular faith. I look at the question through more secular eyes - what will actually work and be politically and legally more palatable for the most people.
So either you have no reason for your belief or you're afraid to offer it because you recognize it as weak.
We're waiting. But I'm not holding my breath.
Many Americans have no religious or moral opposition to contraception and find the linkage of the anti-abortion movement and the anti-contraception movement somewhat strange at best. At worst, it pushes away people who want couples to retain the right to plan family size and spacing, but are against abortion - because it enables the pro-abortion side to lump contraception in with abortion under the euphemistic umbrella of "reproductive freedom."
It seems like it plays into the hands of the pro-choicers quite well by advocating against birth control as well as abortion - that simply makes it easier for the NARAL and Planned Parenthood wackos to decry the loss of their "reproductive rights."
In my not-so-humble opinion, less-religious or non-religious political moderates could really be brought to the anti-abortion side of things if the message was presented in a reasonable and non-judgemental manner. I respect that Catholics have a moral objection to the Pill and to contraception in general, but that does not mean such religiously-based moral objection should apply to secular society as a whole.
Infanticide, on the other hand, can be condemned by just about any reasonable observer - it is unnatural and un-civilized for a woman to kill her own offspring.
Like I've said, I don't expect faithful Catholics to agree with me on the issue of contraception being OK. But looking at the anti-abortion movement from a purely-secular standpoint, it's pretty clear that the argument of "the Pill = abortion" simply gives ammunition against us to the other side.