Its obvious.
A child is a massive economic burden to a foid that still wants to whore around after letting a betabux cum inside of her. Also, her SMV drastically goes down once they have a child. Her pussy vastly loosens, and she now has a huge burden of responsibility. She can't whore around anymore unless she can afford a nanny.
The only SMV male she will be able to attract are lower tier men who are obviously lower tier, because they are lonely, single, and willing to take anything they can get. Foids sniff it out and can tell a low value loser from a high value one. There are low value losers that will settle for a single mother and there are those that won't. But now, she is in a position where she constantly has to test the waters, potentially getting used over and over by low value losers. If she finds that he will betabuxx for her for a long time before she decides to give him sex, then she truly sees him as a betabuxx.
A high value male will not tolerate a single mother for a long term relationship. He will make it pretty clear to her she is only good for a couple of fucks. A low tier male, if he shows signs that he will not be devoted to her, because of her child being from another father, she will seek another low value male in line. But thats the key, its only low value males from now on for her.
Abortion gives foids more power and leverage in dating, sex, and marriage. But all of society ends up suffering because of their selfishness.