Signs of Fertility

National Zoo researchers tracked the hormone levels in Mei Xiangs urine to determine her peak fertility for artificial insemination and then to judge when she might give birth.

SOURCE: National Zoo Conservation and Research Center | GRAPHIC: The Washington Post - December 08, 2005

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Signs of Fertility

National Zoo researchers tracked the hormone levels in Mei Xiangs urine to determine her peak fertility for artificial insemination and then to judge when she might give birth.

National Zoo researchers tracked the hormone levels in Mei Xiangs urine to determine her peak fertility for artificial insemination and then to judge when she might give birth.