Does having short temperament or often verbal duals with partner during pregnancy affect Child's long term mental being?

There are no direct confirmed studies regarding this but some are suggesting that stress in the womb can affect a baby's temperament and neurobehavioral development. Infants whose mothers experienced high levels of stress while pregnant, particularly in the first trimester, show signs of more depression and irritability. In the womb, they also are slower to "habituate" or tune out repeated stimuli -- a skill that, in infants, is an important predictor of IQ. But it could also be the reverse; babies in the womb whose mommies had high level of stress have also been observed to be very resilient. My mother strongly believes in this. She claims that my youngest brother has a no nonsense attitude and has an air of melancholia surrounding him compared to me and my elder brother because she went through an emotional rollercoaster when she was pregnant with him. http://www.m.webmd.com/baby/features/fetal-stress