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Postmenopausal orcas seem to prevent sons from getting into fights

Male orcas with a surviving postmenopausal mother have fewer signs of injury than those whose mothers are dead or still reproducing

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Giving birth at an older age is linked to a longer life in women

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First over-the-counter birth control pill approved in the US

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cooperative breeding in redstarts

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Birds from two different species raise chicks together in one nest

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Male spider mites rip off females’ skin to be first to mate with them

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Crocodiles can reproduce without males – and maybe dinosaurs could too

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One-off injection may provide lifetime contraception for female cats

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Beetles that receive less care as larvae may become better parents

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Male crazy ants have two different sets of DNA in their bodies

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Invasive Burmese python in Florida lays a record 96 eggs in one go

A female Burmese python – an invasive species in the US – has laid a clutch of 96 eggs in one go, almost double the average for these snakes

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Freak storms stopped tens of thousands of birds breeding in Antarctica

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Changes to surrogacy laws must consider future reproductive technology

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Male birth control drug is 100 per cent effective in mice

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Orca mothers forgo future offspring to care for their full-grown sons

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