Pre-birth matching in adoption is wrong. A woman or girl who is unsure about how she will look after her baby should not be pressured into giving that child up for adoption and pre-birth matching is the worst kind of coercion. Having potential adoptive parents and so-called adoption counsellors around during the pregnancy and even the birth does nothing to help the mother, it serves only to guilt her into handing over her child.
As for the practice of signing adoption papers straight after the birth, even within several days, that should be illegal. When I had my baby last year, I was in no condition to sign anything of that magnitude - luckily I was not in that position. As far as I know, you have to be of sound mind and body to be legally competent to sign those kinds of documents. A mother who has just given birth has new hormones coursing through her body, her body has just been through a massive trauma, her brain chemistry is changing - this cannot be considered legally competent.
STOP PRE-BIRTH MATCHING NOW!!!!!!!!