A free pregnancy test dispenser hangs next to a condom dispenser in the women's restroom at the Peanut Farm bar in Anchorage. Anne Hillman/KSKA hide caption

itoggle caption Anne Hillman/KSKA

In the technique known as intracytoplasmic sperm injection, a fertility specialist uses a tiny needle to inject sperm into an egg cell. Mauro Fermariello/Science Source hide caption

itoggle caption Mauro Fermariello/Science Source

There's a widely held assumption that a slight imbalance in male births has its start at the very moment of conception. But researchers say factors later in pregnancy are more likely to explain the phenomenon. CNRI/Science Source hide caption

itoggle caption CNRI/Science Source

A mother feeds her new baby at the Yida refugee camp in South Sudan, which has the highest maternal mortality rate in the world. About 1 in 7 women in South Sudan die from causes related to pregnancy. Paula Bronstein/Getty Images hide caption

itoggle caption Paula Bronstein/Getty Images

Mary Harris was relieved when Stella was born with a mop of thick black hair, as if she had been protected from the chemo somehow. Courtesy of Howard Harris hide caption

itoggle caption Courtesy of Howard Harris

Ultrasound is often used for prenatal screening. It's just one of several prenatal screenings available to pregnant women. iStockphoto hide caption

itoggle caption iStockphoto

A woman enters the Ebola treatment center at the Island Hospital outside of Monrovia, Liberia, Oct. 6. She said she was bleeding heavily from a miscarriage and was turned away from other clinics in the city. John Moore/Getty Images hide caption

itoggle caption John Moore/Getty Images

A healthy baby still tops women's wishes for their future children, but intelligence and athletic skill are gaining importance. Claire Fraser/ImageZoo/Corbis hide caption

itoggle caption Claire Fraser/ImageZoo/Corbis