[Strategerist]

A woman's HcG levels--the usual way pregnancy is determined--don't start rising until after implantation.

Which is why most people don't consider someone pregnant until after implantation.

Good luck convincing most of the country that a single cell is a "baby."

[dangus]

You're not talking about single cells. A Zygote is not visibly human, but it is very defnitely multi-cellular.

[steve86]

Good luck convincing most of the country that a single cell is a "baby."

As another poster pointed out, the zygote is multi-cellular at this point.

Much more importantly, those who abort the fetus at this stage will have to convince God that the fetus is NOT a baby.

[Irish_Thatcherite]

The single cell has 46 chromosomes - what more proof do you need?

[hocndoc]

Natural pregnancy in humans begins in the fallopian tube.

I do wish someone would do the research necessary to determine whether or not the post-coital formulations interfere with implantation or whether the corpus luteum overrides the hormones of the pills.