Missing gene in mouse sperm could explain infertility

Mice lacking a certain gene are unable to produce offspring because their sperm lack the connection between the tail and the head. A new thesis from the University of Gothenburg indicates a probable cause of male infertility.

Is age linked to the picture of the perfect partner?

How do women picture the partner of their dreams? And how does this vary between women based on their age? A team of researchers led by the University of Göttingen investigated the complex relationships between age and preferences ...

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Heterosexuality

Heterosexuality is romantic or sexual attraction or behavior between members of the opposite sex or gender. As a sexual orientation, heterosexuality refers to "an enduring pattern of or disposition to experience sexual, affectional, physical or romantic attractions to persons of the opposite sex"; it also refers to "an individual’s sense of personal and social identity based on those attractions, behaviors expressing them, and membership in a community of others who share them". The term is usually applied to human beings, but it is also observed in all mammals.

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