"It's hard to absolutely rule out the possibility that one or more of the emergency contraceptive pill (ECP) formulations *might* act to block fertilisation, or might make the fertilised embryo less likely to implant. But with one exception that I'll get to in a bit, there doesn't seem to be any solid evidence that this happens."

Thanks. With the amount of rhetoric flying around, especially here in the Christianity-heavy part of the country, it's hard to find what things actually do, or at least what we think they do.

Mind sharing why you use the term "family planning" to refer to contraception?