FReepers here is the Sidewalk Counseling Masterclass linky
https://equalrightsinstitute.teachable.com/p/sidewalk-counseling
RealOptions.com is a great resource.
First I would talk to any couple in my circle of friends (and their own) about their willingness to adopt a child, then I would take that list of potential adoptive parents and I would say “You must know that there are thousands of loving couples willing to adopt the child you carry.” to the woman and then hand her the list.
My experience has been that the good-hearted people who attempt to talk to women headed into the clinic often fail to persuade even those who are unsure about their decision. The problem is that arguments that seem persuasive to a person who is pro-life for religious reasons do not carry the same weight to someone from a different background.
For example, “did you know your baby has a heartbeat” only resonants if you think a heartbeat equals having a defined body and that a defined body is a person. Another argument that is completely unconvincing is to tell the woman that “thousands of people would like to adopt your child.” The premise here is that the pregnant woman does not want her child. If she really wants nothing to do with motherhood, she will be opposed to continuing the pregnancy. Except in an unusual case, for example a woman who is too old or young to mother a child, she is not going to be persuaded because frankly speaking giving a child up to adoption has become more shameful and heartwrenching than having an abortion, a public rather than private event. Pro-life advocates simply fail to acknowledge that reality. I am not arguing in favor of abortion here, simply that this needs to be acknowledged in reaching out to someone who doesn’t share your beliefs.
The woman you are most likely to reach is the woman who is conflicted. If things were different she would like to have the child. Maybe she is being pressured by the father; maybe she despairs about how to support the baby. Telling her that “thousands of people would like to adopt your child” pours salt in the wound. If she can’t have the child she wants, hey, why not make some rich woman happy instead. Arguments like this can reek of insincerity - no one is expressing any concern about her, just getting their hands on baby flesh.
The most convincing arguments (and I speak from personal experience) is asking a woman whether anyone has pressured her into doing something she isn’t sure about. Offering to be an advocate can make all the difference. Is she doing it due to finances? If so, she doesn’t have to go down that road because help is available (and if you have nothing concrete to offer other than ‘adoption’ then you are not really offering the woman a choice).
Just let them hangout with a 1 year old for a day. I think that they would realize this is a HUMAN and cool as heck.