Answer by taking a quote from the following article:

Margaret Higgins Sanger (born Margaret Louise Higgins, September 14, 1879 - September 6, 1966, also known as Margaret Sanger Slee) was an American birth control activist, sex educator, writer, and nurse. Sanger popularized the term "birth control", opened the first birth control clinic in the United States, and established organizations that evolved into the Planned Parenthood Federation of America. Sanger used her writings and speeches primarily to promote her way of thinking. She was prosecuted for her book Family Limitation under the Comstock Act in 1914.

Sanger worked with African American leaders and professionals who saw a need for birth control in their communities. In 1929, James H. Hubert, a black social worker and the leader of New York's Urban League, asked Sanger to open a clinic in Harlem. Sanger secured funding from the Julius Rosenwald Fund and opened the clinic, staffed with black doctors, in 1930. The clinic was directed by a 15-member advisory board consisting of black doctors, nurses, clergy, journalists, and social workers. The clinic was publicized in the African-American press as well as in black churches, and it received the approval of W. E. B. Du Bois, the co-founder of the NAACP and the editor of its magazine, The Crisis. Sanger did not tolerate bigotry among her staff, nor would she tolerate any refusal to work within interracial projects. Sanger's work with minorities earned praise from Martin Luther King, Jr., in his 1966 acceptance speech for the Margaret Sanger award.  From 1939 to 1942 Sanger was an honorary delegate of the Birth Control Federation of America, which included a supervisory role--alongside Mary Lasker and Clarence Gamble--in the Negro Project, an effort to deliver birth control to poor black people. Sanger, over the objections of other supervisors, wanted the Negro Project to hire black ministers in leadership roles. To emphasize the benefits of hiring black community leaders to act as spokesmen, she wrote to Gamble:  We should hire three or four colored ministers, preferably with social-service backgrounds, and with engaging personalities. The most successful educational approach to the Negro is through a religious appeal. We don't want the word to go out that we want to exterminate the Negro population, and the minister is the man who can straighten out that idea if it ever occurs to any of their more rebellious members.  New York University's Margaret Sanger Papers Project says that though the letter would have been meant to avoid the mistaken notion that the Negro Project was a racist campaign, conspiracy theorists have fraudulently attempted to exploit the quotation "as evidence she led a calculated effort to reduce the black population against their will".  In 1929, Sanger formed the National Committee on Federal Legislation for Birth Control in order to lobby for legislation to overturn restrictions on contraception. That effort failed to achieve success, so Sanger ordered a diaphragm from Japan in 1932, in order to provoke a decisive battle in the courts. The diaphragm was confiscated by the United States government, and Sanger's subsequent legal challenge led to a 1936 court decision which overturned an important provision of the Comstock laws which prohibited physicians from obtaining contraceptives. This court victory motivated the American Medical Association in 1937 to adopt contraception as a normal medical service and a key component of medical school curriculums.  This 1936 contraception court victory was the culmination of Sanger's birth control efforts, and she took the opportunity, now in her late 50s, to move to Tucson, Arizona, intending to play a less critical role in the birth control movement. In spite of her original intentions, she remained active in the movement through the 1950s.  In 1937, Sanger became chairman of the newly formed Birth Control Council of America, and attempted to resolve the schism between the ABCL and the BCCRB. Her efforts were successful, and the two organizations merged in 1939 as the Birth Control Federation of America. Although Sanger continued in the role of president, she no longer wielded the same power as she had in the early years of the movement, and in 1942, more conservative forces within the organization changed the name to Planned Parenthood Federation of America, a name Sanger objected to because she considered it too euphemistic.  In 1948, Sanger helped found the International Committee on Planned Parenthood, which evolved into the International Planned Parenthood Federation in 1952, and soon became the world's largest non-governmental international women's health, family planning and birth control organization. Sanger was the organization's first president and served in that role until she was 80 years old. In the early 1950s, Sanger encouraged philanthropist Katharine McCormick to provide funding for biologist Gregory Pincus to develop the birth control pill which was eventually sold under the name Enovid. Pincus had recruited Dr. John Rock, Harvard gynecologist, to investigate clinical use of progesterone to prevent ovulation. ("The Pill" (2009). PBS series. Retrieved November 29, 2009.)

How many clinics does Planned Parenthood have?