A few aleatório Q's concerning polyjuice potion and memory charms!

Number one - Is there a way to make polyjuice potions effects permanent? If so, could you then perhaps, give or transfer the person in which you were made to look like's memories into you. Remove all of your current memories. To then make the witch/wizard think that they are that person? (Gosh! I hope I a make sense.)

Two - If the person you were made to resemble was pregnant. Would you, yourself actually be pregnant? And if you continuously took polyjuice potion for the duration of the pregnancy. (I know that this is probably impossible to do. Considering that that person wound naturally need to sleep. So, as a work around, I'd say that they'd be fed the potion through a cannula.) Would you then bare a duplicate of that actual person's child?

Three - If you were male, and was then transformed into a female under the effects of polyjuice potion. Could you get pregnant?