Amber Medel weighs her 3-week-old baby, Elijah, as lactation consultant Carol Chamblin takes note. Medel had problems breast-feeding and Chamblin encouraged her to use a breast pump to get the milk flowing more easily. M. Spencer Green/AP hide caption

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"It's one of the weird illusions we all live under: that there is a right way to parent." — Jennifer Senior James Duncan Davidson/TED hide caption

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A young girl sells pastries on a street in El Alto, Bolivia. While most of the world is trying to put an end to child labor, Bolivia has legalized it. Juan Karita/AP hide caption

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Usman (right), 7 months, and Abdullah (left), 18 months, are held by their mothers while they wait to receive the polio vaccine at the Jalozai refugee camp near Peshawar, Pakistan. Daniel Berehulak/Getty Images hide caption

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During nationwide polio campaigns, hundreds of thousands of health workers go door to door, giving children two drops of the polio vaccine. Anadolu Agency/Getty Images hide caption

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A health worker gives a child the polio vaccine in Bannu, Pakistan, June 25. More than a quarter-million children in Taliban-controlled areas are likely to miss their immunizations. A. Majeed/AFP/Getty Images hide caption

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For 15 years, Amran Mahamood made a living circumcising young girls in Hargeysa, Somalia. Four years ago, she gave it up after a religious leader convinced her that Islamic law did not require it. Nichole Sobecki/AFP/Getty Images hide caption

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Dr. Donald Brown inoculated Kelly Kent with the HPV vaccine in his Chicago office in the summer of 2006 — not long after the first version of the vaccine reached the market. Charles Rex Arbogast/AP hide caption

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Thousands of young immigrants, many of them from Central America, have crossed illegally into the United States this year, causing an unprecedented humanitarian crisis on the U.S.-Mexico border. John Moore/Getty Images hide caption

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Logan Kovach, 6, Matthew Kovach, 2, and Allyson Kovach, 5, eat a lunch distributed by the YMCA in Hopkins County, Kentucky. Pam Fessler/NPR hide caption

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Walt Whitman High School's Caroline Schweitzer runs through a host of Severna Park High School defenders during a semifinal game in Maryland's Class 4A/3A lacrosse tournament in May. Toni L. Sandys/The Washington Post/Getty Images hide caption

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