All are rendered in lovely detail by Herzog and the five women of the cast, directed by Anne Kauffman with characteristic attention to the importance of offhand nuance. Information is revealed in a steady drip of medical jargon, bureaucratic obstacles and personal history; the moment-to-moment concerns in Mary Jane are often quotidian. (As a friend once advised the title character: “You’ll still have good days and bad days.”) The world of the play is unblinking but not bleak. Herzog shows the strain of Mary Jane’s situation, but she also succeeds in dramatizing kindness, attentiveness, honesty, connection.