Polish Deputy Culture Minister and Head of Conservation Piotr Zuchowski speaks at a news conference on the so-called 'Nazi gold train' in Warsaw, Poland, on Friday. Radek Pietruszka/EPA/Landov hide caption

itoggle caption Radek Pietruszka/EPA/Landov

Eggs may be more vulnerable to freezing than embryos, but that's just one factor that affects the odds of having a baby with frozen eggs. Jean-Paul Chassenet/Science Source hide caption

itoggle caption Jean-Paul Chassenet/Science Source

Louise and Michael Toscano, mother and father of Brooklyn Public Library patron Vera Toscano, on their wedding day. The reception was at the Grand Paradise Ballroom in the Williamsburg neighborhood on May 9, 1926. The photo is now part of the Culture in Transit online collection. Courtesy of Vera Toscano/Brooklyn Public Library hide caption

itoggle caption Courtesy of Vera Toscano/Brooklyn Public Library