Frozen sperm straws and embryos are stored in liquid nitrogen, in a process known as cryopreservation. One question confronting the courts: Should embryos such as these be treated as property, or as children subject to custody action? Veronique Burger/Science Source hide caption

itoggle caption Veronique Burger/Science Source

Stefano Gabbana (left) and Domenico Dolce, seen here during the recent Milan Fashion Week, are being criticized for remarks about same-sex families, sparking a boycott led by musician Elton John. Daniel Dal Zennaro/EPA/Landov hide caption

itoggle caption Daniel Dal Zennaro/EPA/Landov

The U.K. could become the first country to legalize the production of a human embryo from three donors. Here, the freezing platform for an embryo, top, also known as a straw, is seen at an in vitro fertilization lab. Jim Stevens/MCT/Landov hide caption

itoggle caption Jim Stevens/MCT/Landov

Tina Nevill of Essex, England, holds Poppy, who was conceived by in vitro fertilization. The U.K.'s health system records all IVF cycles performed in the country. Barcroft Media/Landov hide caption

itoggle caption Barcroft Media/Landov
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