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Top stags sire more sons

Male deer with better sperm invest in male offspring.

The fertility of male red deer helps to determine the sex of their offspring, say biologists in Spain. The best-quality sperm tends to father sons, while the less healthy sperm tends to lead to daughters.

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Posted by Nicola Jones on November 30, 2006 07:00 PM |

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So, women are the weakest link?

Posted by: Dustin | December 1, 2006 05:40 PM

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