Female sex hormones produced mainly in the ovaries that control reproductive development and maintain female characteristics.
From Greek 'oistros' (frenzy, desire) plus '-gen' (producing). The term was coined in the 1920s when scientists discovered these fertility-inducing hormones.
Estrogen isn't just one hormone—it's actually a whole family of compounds, and your body can convert one type into another depending on what it needs, making it incredibly adaptable.
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