Related topics: genes · females · pregnancy · eggs · parents

'Old' sperm produces healthier offspring

Sperm that live for longer before fertilising an egg produce healthier offspring—according to new research from the University of East Anglia and Uppsala University in Sweden.

Fish fertilize eggs in their male relatives' nests

Male cichlid fish sometimes fertilize eggs in nests belonging to one of their male relatives, a behaviour that is counter-intuitive yet ultimately beneficial, according to a study published in BMC Biology.

A single gene turns socially organized bees into social parasites

A small change in the genetic makeup of the South African Cape bee turns the socially organised animal into a fighting parasite. This change ensures that infertile worker bees begin to lay their own eggs and fight other colonies. ...

Childhood stress of mice affects their offspring behavior

Russian neuroscientists report that the stress experienced by mice during their first weeks of life affects not only them, but also their offspring. The data will help to understand how negative experience in early life affects ...

More heatwave summers will affect animals

Heatwaves similar to those experienced in Europe in 2018 can have a very negative impact on animals. A new study from Lund University in Sweden shows that overheated birds have smaller offspring, and that those that are born ...

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