Janam Kundali for marriage (Horoscope Matching) is a matter of belief. If one believes it, it may happen. If one does not, it may never happen.
When it comes to horoscope matching and synastry, it will not predict whether a marriage will succeed or fail. But it can surely predict what the prospective problems that the couple could face
Therefore, horoscope matching can act as a guiding force for both partners. It provides forewarning of problems that can be worked upon and can be curbed to an extent. This cautiousness may lead to a happy married life.
Besides, horoscope matching is done to make sure that what is negative in one partner's birth chart should be positive in the other's birth chart so as to nullify the negative effects of the former one.
Example: Let's say the female has Saturn in the 5th house. This causes problems in child birth and may lead to childlessness.
Now a male chart should be selected for this girl, who either has
This will ensure the negative 5th house being nullified by positive 5th house of the male. Hence there will be very few or no problems in child birth.
Also, marriage is a very strong union of two natives. Both the partners here can be made to perform remedies before their first night to control the most malefic planet in their birth charts for the whole life (one planet from the male's chart and one from the female's chart).
Click on the below links to see the complete marriage articles.