The nation's favourite doctor, Dr Ranj, is here to explain everything you ever wanted to know about puberty - plus lots more. What does it mean to be a boy? And I'm not just talking about what you have between your legs, but what life is really like for boys. Everything I've learned from my career as an NHS doctor and my experiences is in this twenty-first-century guide to being a boy.

Weithiau gall tyfu i fyny deimlo'n debyg i fod mewn ffilm arswyd! Efallai dy fod yn teimlo'n ddryslyd; yn hunanymwybodol; ond yn llawn cyffro hefyd. Mae'n siŵr fod mil o gwestiynau'n gwibio drwy dy feddwl. Paid â phoeni; dwi yma i dy gefnogi.