Medical treatment

Q: Is it permissible in Islam to use stem cells and if the stem cells are from unknown source who is not known to you. Is this allowed and what is the fatwa regarding this?

Q: A non muslim person has made a firm intention to accept islam Alhamdulillah. The challenge is that this person has been undergoing a sex change to such an extent that all features are feminine including breasts and voice. The only procedure this person needs to undergo is the sex organ change.

1. Should this person be advised to reverse the process or should this person be allowed to go ahead with the sex change. (If told not to there is a fear that he will turn away from Islam).
2. Should the above be done after this person recites the shahadah or before?
3. At this stage (before the sex organ change)is this person regarded as a male or a female  considering all apparent features are feminine?
4. Who should be allowed to interact with this person a muslim male or a female?
5. What other advice can mufti sahib give regarding this matter?

A detailed response on the above matters with shar'ee citations will be greatly appreciated.

Q: I want to ask if family planning allowed in Islam? Or is it permissible for a woman to use a copper T to give some gap between pregnencies. Is it allowed to use contraceptives? Is using a condom allowed to prevent pregnancy?

Q: I would like to know whether stem cells are allowed in Islam. In this case I would be storing it for my heirs only. Furthermore I would like to know whether a medical aid scheme is allowed. The medical aid portion is only a hospital plan. No insurance. Please advise whether the above is allowed and if not please comment in detail why not.

Q: Is the influenza flu vaccine harm because it contains pork gelatine and has to be sprayed through the nose?

Q: Can I use the medicines to increase one's desires?

Q: I orderd some vitamins and found out it has gelatine in it. However the source of gelatine is from a cow. Can I take the vitamins?

Q: Is homoeopathy medicine a sunnah is it encouraged by Islam?

Q: Maybe I sound crazy but this is a very serious issue. I heard in Pakistan a girl became a boy naturally. This is strange, but I know Allah can do any thing. But my mind is stuck in that I don't want this with me. Is this sheaytaani waswasa? Please help me I never want to become like this. I am a girl and I am happy with that.