Nearly 80% of teachers visiting the site visit it regularly or plan to do so now that they have discovered it.
Summary of teacher feedback to June 2012
Sex hormones are responsible for some of the most dramatic changes that occur in the body. They control puberty, egg and sperm production, pregnancy, birth and lactation (breastfeeding).
In girls, between the ages of about 10 and14, the pituitary gland produces Luteinising Hormone (LH) and Follicle Stimulating Hormone (FSH) which together stimulate the production of the sex hormones by the ovaries.
The ovaries start to produce oestrogen and progesterone which begin the bodily changes that happen during puberty. The changes, known as secondary sexual characteristics, are: