Taqleed is an obligation based on intellect. Muslims are required to implement the laws of the Islamic religion, and they cannot be known in details and in a correct way except by referring to the people of expertise, who are the religious scholars and relying on them in their findings that they concluded by research and study. Evidence of this concept from the Holy Quran is when Almighty Allah said: “And the believers should not all go out to fight. Of every troop of them, a party only should go forth, that they (who are left behind) may gain sound knowledge in religion, and that they may warn their folk when they return to them, so that they may beware.”(Qur'an, 122:9).
Emulation (taqlīd) is a necessity when a lay believer faces a situation where he does not know the correct religious ruling, as he is supposed to refer to the expert to get the proper answer. Otherwise, without referring to the expert and implementing the ruling, he would be liable for the mistake, whereas he will not be liable when he refers to the expert, even if the latter made a mistake. Taqlīd secures a layperson from liability before the Almighty Allah.
If the miscarried fetus was recognized as a child: (a) If she has a habit of duration, then it is obligatory not to offer the prayers and not to have sexual intercourse with her husband for the number of days that corresponds to her menstruation period. If she continues to see blood after this period, then as an obligatory precaution she should do the same for a further day. She may continue to do so until the completion of the ten days. The remaining period of discharge is considered to be as Istihadha. (b) If she does not a habit of duration, she should observe the above mentioned rulings for ten days. The remaining period of discharge is considered to be as Istihadha, and based on an obligatory precaution she should observe the rules of the woman during lochia (Nifas) for the completion of eighteen days. If the miscarried fetus was not recognized as a child, like if it is a clot or lump of flesh, then based on an obligatory precaution she should offer the prayers based on the appropriate level of Istihadha and refrain from performing what is prohibited on the woman during lochia (Nifas).
It is permissible to give blood and donate it. It is some sort of charity and an expression of high morality. It is a good deed if the said was intended.