Infertility treatment

Q: We are married for more than 8 years. We have no children. We are trying to get kids from the beginning but not yet. Doctor advised us to take through test tube. Is it acceptable according to Quran or Hidith?

Respecting one's guests

Q: How should one treat ones guest? Does the guest have any rights? Does the Ahadiths mention any thing regarding ones guest also if one shows disrespect to his / hers guest is it a sin? Is it correct to ask if you'll will have anything? If mufti saheb could narrate any incedient in the live of nabi [Sallallahu Alayhi Wasallam], the sahabaa [Radiyallahu Anhum] and in the lives of great uleama of deoband on how they took care of their respected guess?

Gheebat

Q: I have a question that I have a distant uncle who is sick and old and that when I  inquired about his health from my brother over the phone he said that he's not well and doesn't recognise people, today when I met with another relative he was asking me about this uncle and I said that he's not well and that he doesn't recognise people. My question is that is it a gheebat (backbite)?  Please advice me.