Since only 13% of women use insurance for abortions, not too many women will be impacted by the Stupak amendment:

The restrictions were introduced as an amendment by Rep. Bart Stupak, a Michigan Democrat who opposes abortion. They aim to ensure that no taxpayer dollars fund abortion. To that end, the government-run public insurance plan set up by the House bill wouldn’t cover abortion, except in the rare cases of rape or incest, or when the pregnancy endangers the woman’s life.
Individuals getting federal subsidies to buy insurance on a new health-care exchange — a potentially large group, reaching from the working poor well into the middle class — also would be barred from buying policies that cover abortion, unless they do so with their own money. Supporters of legal abortion fear that insurers will stop offering abortion coverage for all their customers to streamline their plans, meaning millions of women could lose benefits they currently have.
[…]
Just 13% of abortions nationwide are billed to private insurance, according to a 2001 study by the Guttmacher Institute, which supports abortion rights but is cited as a reliable source of data by both sides in the abortion debate. An unknown number of people might seek reimbursement from their insurance company after the procedure. Applying the 13% figure to the most recent abortion data available suggests that fewer than 160,000 women a year rely on insurance to cover the cost of an abortion upfront.
More than 90% of abortions take place in the first trimester, at an average cost of $413.

Those who don’t have insurance now will not be losing something they have, they will just have to figure out a way to pay for it just as they have been doing.
Since only 160,000 will be impacted, why doesn’t the compassionate left raise funds to pay for the abortions of those who will now have to pay for their own abortions. If feminist organizations like NOW want women to have free access to abortions, why don’t they pay for them?