As per the Medical Astrology, the Mars is responsible for the heat that has been generated within the body. Those who has Mars in 2nd, 4th, 6th, 8th and 12th house would have excessive heat in their body. By getting married to a person, who enjoys normal temperature in his/her body their sexual interaction would not be conducive. Also the difference in Blood temperature (Body temperature) may not be conducive in conceiving too. The difficulties in conceiving and delivering a baby could happen because of this issue. The different type of Blood group could harm the normal delivery of a baby. Thus in olden days the women or baby would have died because of complications during the child birth. Or it would have created a martial discard among the couples leading to the separation. So our anscestors might have studied this aspect @ relationship between this medical exgiencies and placement of Mars in the particular houses. So they might have named it as Mangalik o...