The National Institutes of Health hosts a two-day forum on malpractice issues in childbirth, beginning at 8:30 a.m. in the Masur Auditorium. The conference will conclude Tuesday with a 4:15 p.m. news conference. $/ TUESDAY

Li Xiannian, president of the People's Republic of China, arrives for a state visit. The American Legion and Columbia University release the results of their joint study of the effects of service in Vietnam on veterans. The briefing will be at 10 a.m. at the legion's headquarters, 1608 K St. NW. Executive Women in Government sponsors a debate on comparable worth between Rep. Mary Rose Oakar (D-Ohio) and Phyllis Schlafly. The event will begin at 6 p.m. in the National Press Club's Edward R. Murrow Room. Varel Bailey, president of the National Corn Growers Association, holds a 9 a.m. news conference on a study by Wharton Econometrics on the impact of shifts in farm policy on the U.S. economy. The briefing will be held at the Hyatt Regency Capitol Hill. The National Bureau of Standards and the National Fire Protection Association sponsor a three-day fire research strategy conference at the bureau's headquarters in Gaithersburg. WEDNESDAY

The Heritage Foundation sponsors a debate on the topic, "Does a Liberal Foreign Policy Service Soviet Interests?" featuring Dinesh D'Souza, managing editor of Policy Review, and Christopher Matthews, administrative assistant to House Speaker Thomas P. (Tip) O'Neill Jr. (D-Mass.). The event is to begin at 6 p.m. in the auditorium of the foundation's headquarters at 214 Massachusetts Ave. NE. THURSDAY

The Energy Department and the Organization for Economic Cooperation and Development hold a 10 a.m. briefing on the results of their final tests in the Loss-of-Fluid Test Series on the Idaho nuclear reactor that they recently melted down. The briefing will be at 10 a.m. at 1800 Massachusetts Ave. NW. The Chamber of Commerce sponsors a rally in opposition to pending comparable-worth legislation at 9 a.m. in the Hall of Flags of its headquarters building, 1615 H St. NW. FRIDAY

Senate Majority Leader Robert J. Dole (R-Kan.) speaks on "The Role of Black Republicans in the 1980s and 1990s" at the summer luncheon of the Council of 100 Black Republicans. The luncheon will be held at 11:30 a.m. in Room B338-339 of the Rayburn House Office Building. Phone 628-2216.