Feminism has done little to decrease women's desire to become mothers, other than delay it. The problem is that feminism convinced an entire generation or more of women to delay those urges until after they had their education and careers, thus missing their most fertile time in life.
Sadly, there are too few feminists allowing women to embrace their femininity and unique ability to procreate when they are most fertile and pursue career later in life. Life is quite long; there is time to do it all - in the right order.
Rosie the Riveter convinced women to leave their kitchens and children and go to work during WWII. They were then convinced to leave their jobs and return home when the war ended and men needed the jobs. Women have been directed and engineered as society needed them to be.
1) two spendable incomes instead of one by having them hold high-powered careers
2) support of two multi-billion-dollar industries: the reproductive technology sector ($3 billion) and the adoption sector ($2-3 billion a year in the U.S, and $6.3 internationally).
Greed is also what contributes to competitiveness between women over the scarce prize of a baby. They are fighting so hard to have what they want, they are able to ignore the harm they cause another. Like women fighting over a blue-light special at bargain basement annual bridal gown sale!
There are also factors of human nature. One is something called "fundamental attribution error."
When we are trying to understand and explain what happens in social settings, we tend to view behavior as a particularly significant factor. We then tend to explain behavior in terms of internal disposition, such as personality traits, abilities, motives, etc. as opposed to external situational factors.
This can be due to our focus on the person more than their situation, about which we may know very little. We also know little about how they are interpreting the situation.
Western culture exacerbates this error, as we emphasize individual freedom and autonomy and are socialized to prefer dispositional factors to situational ones. International adoption increases the gap and distances the oppressed from those who profit.
Women are judged most for their maternal/parenting skills/ability and are harshest on and most judgmental of one another when they perceive a lack thereof. Parenting skills hold less expectation of perfection in men, so they are judged much lighter. That is why our courts - and the public - are very unmerciful on mothers who abandon, kill, abuse etc.
Men compete in sports and business. Women, traditionally, have this one area of comparison, pride and judgment.