The factors listed so far are (my trans): lack of faith that results in simulation of consent or an error that determines the will; brevity of married life; abortion procured to prevent procreation; stubborn persistence in an extramarital affair at the time of or just after the wedding; improper concealment of sterility or of a serious and contagious disease; concealment of children from a previous relationship; concealment of incarceration; entering marriage for reasons completely foreign to married life; unplanned pregnancy of the woman; physical violence inflicted to extort consent; lack of use of reason proved by medical documents; and so on.