The relationship between the 1st and the 7th lords has, to be studied thoroughly, before predicting love marriage on a nativity. Another important combination which causes love-marriage is the relationship between the 5th lord and the 7th lord either by mutual exchange of houses or by conjunction.
The difference between the usual arranged marriage and love marriage is that, while the former is arranged by the third party, the latter is managed by the boy and the girl themselves. Love marriage presupposes intimacy and love or infatuation among the boy and girl. Love should definitely precede the marriage ceremony so that it could be called ‘Love marriage’. Mythologically it is called Gandharva Vivaha.
While looking for a yoga causing love marriage, we have to assess the 1st and 7th houses and the relationship between the 1st and 7th lords in the nativity. The native’s capacity for love has also to be ascertained and for this we have to look at the 5th house, which is associated with the lover or the beloved and Venus the karaka for love. The lord of the 11th house also plays its part. The 9th house is the house of fortune, which also is to be studied simultaneously.
A study of persons, who have had romantic experiences in their life, reveals that, when there is an exchange of houses between the 1st and the 7th lords, the native gets response from his beloved or her lover.