Health bill bans coverage for abortion on both public and private insurance offered on the to-be-created insurance exchange. Abortion coverage can be purchased as a separate supplemental policy, but how many of the people who really need that (teens, etc) are going to feel comfortable buying it?
EDIT: After posting, realized the incredible adverse selection problem with an abortion rider. The people who get an abortion rider are the ones who are very likely to get an abortion. The cost will be prohibitive for most even when they ARE someone who is willing and able to buy an abortion rider because the probability of getting an abortion would be so high for people who take the rider.