The absence of doubled notes in this chord gives it a tight, concise sound. Bring your thumb around the back of the neck to damp the open fifth and sixth strings. The diminished chord sounds cool in ...

In itself the Tristan chord is not that unusual. It’s what jazz musicians call a half-diminished chord, but it’s how Wagner leads up to it and away from it that is so tantalising and strange.

This egg supply – known as a woman’s ovarian reserve – decreases with age. If a woman has diminished ovarian reserve (DOR), it means she has fewer eggs in her ovaries compared to other women her age.