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and the most widely known of these is?

- testosterone

starts being produced at how many weeks of foetal development?

most research focuses on behavioural effects most notably in terms of?

what did van de poll do to female rats?

and what ahppened to their behaviour?

- oestrogen

alongside physical what does it cause some women to experience in menstrual cycke?

in extreme cases what has PMS been used as a defence in?

researchers dispute PMS existance as viable?