Biological functions of Mystique when morphed

I have always wondered how does Mystique's transformation works.

Please spare me as I don't read many Marvel comics, just those random ones which I can get.

From what is seen in movie, she can instantly transform into anyone once she gets clear look at him/her. She can even replicate the target's attire. In this case, she doesn't know what he/she looks under the attire, so does she just copies the dimensions to match the size while remaining blue skinned under it?

When Mystique transforms to male characters, does she also inherit the bodily functions? In X-Men:DoFP, we saw that she cries when morphed as Trask. Since male and female tear glands function similarly (at least what I assume, never studied Biology), it must not be an issue. But what about other parts that act as outlet for some bodily liquids which differ in functioning due to gender differences? Also does Mystique inherit target's injuries and pain along with it?

If Mystique has never seen a person, but gets his/her photo with only face visible (passport sized). Can she still replicate him/her? If Yes, how does she recreate the body, by her own imagination and assumption?

If Mystique morphs into a pregnant lady she sees, will she also replicate the baby inside. If Yes, when she transforms back to original form, will she terminate the baby?