More medical professionals, including nurses and midwives, would be permitted to perform certain early abortions in California under a bill unveiled Tuesday.

In a news conference at the Capitol that served to both introduce the bill and mark the 40-year anniversary of the Supreme Court's landmark Roe v. Wade decision, lawmakers and women's health advocates said the measure is necessary for women in communities without abortion providers.

They said 52 percent of California counties do not contain a provider, other than hospitals, which often have only limited services.