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oestrogen

World Encyclopedia | 2005 | © World Encyclopedia 2005, originally published by Oxford University Press 2005. (Hide copyright information) Copyright

oestrogen Female sex hormone. First produced by a girl at puberty, oestrogen leads to the development of the secondary sexual characteristics: breasts, body hair and redistributed fat. It regulates the menstrual cycle and prepares the uterus for pregnancy. It is also a constituent of the contraceptive pill.

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