reproduction reproduction

The killer whale J2, better known as "Granny," pokes her head out of the water in the Salish Sea near the San Juan Islands of Washington in July 2016. Granny, who was thought to be about 105 years old at the time, was presumed to have died later that year. Mark Malleson/Center for Whale Research/AP hide caption

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Mark Malleson/Center for Whale Research/AP

Menopause Mystery: Why Do Female Killer Whales Experience The Change Of Life?

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Ovarian tissue after the thaw — ready for reimplantation. Courtesy of The Infertility Center of St. Louis hide caption

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Courtesy of The Infertility Center of St. Louis

Twin Sisters Try To Get Pregnant With Ovaries They Froze In 2009

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A couple from Namibia's Twe tribe outside their home. Tribe members took part in a study that examined the relationship between navigation skills and mating success. Layne Vashro/University of Utah hide caption

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Layne Vashro/University of Utah

Kansas House Speaker Ray Merrick, a Republican, watches the chamber's electronic tally board as it approves a sweeping anti-abortion bill Friday at the Statehouse in Topeka. At left is Majority Leader Jene Vickrey. John Hanna/AP hide caption

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John Hanna/AP