Azteca ants are self-appointed protectors of coffee plants on Mexican plantations. But they have a lot to contend with from other insects.
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Articles on Chemical messengers
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Every woman who reaches midlife will experience menopause when her ovaries eventually run out of eggs. So what’s happening with her hormones?
Multiple hormones produced by the mother, placenta and the foetus drive and coordinate the amazing biological changes and development of the baby that occur with conception, foetal growth and birth.
In recent times, we have learnt more about the connections between the “reproductive” or gonadal hormones and the brain, and how they affect not only women but men as well.
Our bodies have a complex system to control food intake, driven by hormones. Hormone levels also change when we gain and lose weight.
Sleep allows many of our hormones to replenish so we have the optimal energy, immunity, appetite and coping ability to face the day’s highs and lows.
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Professor of Psychiatry, Monash University
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