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

Number one - Is there a way to make polyjuice potions effects permanent? If so, could anda then perhaps, give atau transfer the person in which anda 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 anda were made to resemble was pregnant. Would you, yourself actually be pregnant? And if anda 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 anda then bare a duplicate of that actual person's child?

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