From weight gain to filthy tempers, your sex hormones have a lot to answer for. Of the 50 hormones each of us has in our body, the trio of oestrogen, testosterone and progesterone play crucial roles in puberty, fertility and sex drive.

“Hormones are chemical messengers produced by glands in the endocrine system and released into the bloodstream,” explains physician and intimate health expert Dr Shirin Lakhani. “They work together in the body, like an orchestra, and an imbalance can occur at any life stage and have an effect on others.”

The Telegraph London