A women's trump card with men is sex. Men will compromise and/or pay in many different ways to have sex. Sex places women in a social top dog position. For this social trump card to be of highest value, it needs to have maximum flexibly and be seen as a monopoly. Marriage is based on monopoly sex. While rape is mostly define as men stealing sex without permission.
Pregnancy has a negative impact on the value of this trump card, since it is harder to sell or lease good and services to men, if a women is pregnant. Men will tend to avoid such women, out of respect, as well as due to fear of complications. This makes it harder for women to play the game and diminishes the value of her trump card. Some women get insecure with the weight gain and may feel the need to under sell which can cause price problems, later.
Abortion on demand is like an athlete who gets injured, but through sports medicine is able to make a fast comeback. The lack of abortion is like season ending injury, that can shorten an already brief season; until the petals fall off the rose. The desperation of the women about lack of abortion seems to be a free market reaction to government regulation that targets their industry and livelihood.
Men used to use force or social domination to dominate the women. This was the male trump card. But regulation appeared to where men had to give up that trump card by law. Now the female trump card is seeing its own limitations, which should help level the playing field. The goal appears to be to restore the nuclear family, and all the social cost savings that this can bring.