From the Office of General Counsel and the Policy Committee:
"On November 27, 2013, the Acting Director approved and on December 2, 2013, the Peace Corps confirmed the rescission of MS 263 Volunteer Pregnancy. As a result, pregnancy will not be singled out as a medical condition subject to special rules. Instead, pregnancy will be accorded the level of professional attention and treatment that is appropriate to that condition pursuant to MS 262 Peace Corps Medical Services Program and other policies and technical guides applicable to Volunteer medical issues. Decisions on continued service for Volunteers who become pregnant will be made in accordance with the provisions on medical separation contained in MS 284 Early Termination of Service."
From my understanding of this, the current stopgap is that pregnancy will be treated solely as a medical issue, and the PCMOs have say over leave, termination, continuation, separation, etc. This will hold pretty much until Peace Corps can wrap up and send out new non-discriminatory policies to govern pregnancy-related issues (maternity leave, abortion coverage [although that one is not PC's call], etc).