This is very interesting. I never really thought of it in these terms, but I've heard women express thoughts/feelings that were along these lines. My mother is an ISFJ but is more of an "ambivert" by societal standards; i.e, she doesn't haul up in her room or actively avoid socialization, and actually likes being around people, just gets tired of them easily. However, both times she was pregnant, she claimed that she became "severely opposed" to interacting with others, took leave from her job, refused to answer the phone, etc. She jokingly blames it on my brother and I (INFJ and INTP, respectively) but your suggestion is rather interesting! Maybe we actually did it.
Likewise, a friend of mine (ISTP is my guess, but no confirmation) recently had a baby and it was like a flip from inferior Fe to dominant Fe. One might assume this is just the norm for pregnant women, but it really isn't - As I described, my mother actually became even more introverted during pregnancy, and I've heard plenty of women describe something similar. This friend of mine, though, who was normally very forward with straight logic, suddenly became one of the most sentimental, mystical people around. It surprised everyone, including herself. She may have even presented a bit of Ni-Fe. She abruptly took on a belief in ghosts and spirits, which she had never held before, because she thought she was being "haunted" during pregnancy. Not that all INFJs believe in those things (I don't) but it was strange for her to take on this strong belief in something that held no basis in hard facts, which are usually her specialty.
It could all be blamed on pregnancy hormones, of course, but that's a lot less fun to think about.
Do pregnant women adopt or put on characteristics of their unborn baby's temperament, personality, taste, etc.?
My mum explained to me that she changed in personality while carrying each of my siblings and myself, and how she described the changes was in harmony with the personality of the one she was carrying at the time. Is this a common thing for women or is it rare?
She also is a specialist when it comes to knowing the gender of a baby before it's born, both with herself and other women. Is there a distinct style women portray with either gender?