While favoring birth control pills and intrauterine devices, Dr. Trimble did not support abortion as a suitable method of birth control. "But it ought to be available as a back-up when other methods fail," she said in the 1972 article.

She treated patients at Planned Parenthood's downtown clinic and provided services at satellite offices in Brooklyn and at Goucher College Health Center and Catonsville Community College.

Mary Ruth Seidel worked as a Planned Parenthood educator starting in the late 1960s.

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"Frances was a very elegant, caring, warm and beautiful person who did her job in the most wonderful way," said Ms. Seidel, who lives in Columbia. "It was not easy being medical director of the organization at such a turbulent time in our world," she said. "The '60s were a time of revolution and change, but she adapted and served her patients well."

She said that Dr. Trimble "never imposed anything she believed in on her patients. They loved her and the staff loved her."

Dr. Trimble retired in 1983.

She had lived on Charlesmeade Road in North Baltimore and Guilford, where she maintained extensive gardens and greenhouses. After moving to Roland Park Place in 1996, she was chairwoman of the grounds committee.

She was an accomplished needleworker and as a member of the Roland Park Place Quilting group, made quilts for the children at Mount Washington Pediatric Hospital.

Dr. Trimble volunteered with Meals on Wheels of Central Maryland and worked with hospice patients at the Joseph Richey House. She also participated in the program organized by various Mount Vernon churches that prepared breakfast for the homeless.

Since 1946, she had been an active communicant of Emmanuel Episcopal Church in Mount Vernon, where she had served as a member of its Altar Guild and vestry.

Her husband died in 1979.

A memorial service will be held at 11 a.m. Saturday at the Episcopal Church of the Redeemer, 5603 N. Charles St.

Surviving are two sons, Edward L. Trimble of Baltimore and Dr. I. Ridgeway Trimble III of San Juan Capistrano, Calif.; a daughter, Elizabeth H. Trimble of Baltimore; a brother, Phillip H. Smith of Pittsburgh; and three grandchildren.