"Plan B has been legal for years in the US. It's just never been over the counter before."
I think there's a difference between having to get a doctor involved and just walking into WalMart and buying an abortion.
"I'm fairly sure that the uterine lining is not "hostile"due to Plan B. It doesn't look like the lining is shed early if there's risk of pregnancy."
I admit that contrary information has recently been introduced that requires examination. However, the timing is suspicious, so it requires close examination.
Right now, I don't consider the earlier reports that Plan B kills fertilized eggs to be disproved.
Durand's group biopsied the uterine lining and did not find any thinning or other changes in the lining, except that some women had an increase of glycodelin A, which interferes with fertilization and increases implantation.
Take a look at that "LTI" link. Larimore, Kohlenberg and Sanford, in their Archives of Family Medicine article reproduced at polycarp.org,discussed the strength of evidence of post fertilization effects of the various hormonal contraceptives that are taken every day.