From girls into women: how oestrogen and progesterone alter the female body, from sexual characteristics to spots and body image.
- Puberty in girls normally starts between the ages of 14 and 18.
- Follicle-stimulating hormone (FSH) and luteinising hormone (LH) are released by the brain and target the ovaries.
- The ovaries produce oestrogen and progesterone, which govern the menstrual cycle.
- The ovaries release one egg each month. If it goes unfertilised, progesterone levels fall and the womb lining breaks away.
Puberty in girls normally starts between the ages of 8 and 14.
The follicle-stimulating hormone and luteinising hormone released by the brain target the ovaries.
This stimulates the production of the female sex hormones, oestrogen and progesterone.
These four hormones all work together to govern the biggest puberty ...
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