To learn Nadi Dosha you will first of all have to understand what Nadi in astrology means?. Nadi is one of the eight Ashta that are used to calculate your compatibility with your partner. Total of 36 points are there out of which Nadi has maximum points i.e. 8. Now if there is any conflict between the nadi of two persons then they said to suffer from nadi dosha as per nadi astrology.
If there exists nadi dosha in kundali then most of the astrologers will say direct no to that marriage because the next generation will be weaker or there will be chances of not having the kids at all. But according to some other astrologers the nadi dosha is not that important as to check whether the couple will have strong kids also depends upon other factors like position in the fifth house and so on. To reduce the impact of nadi dosha one can go for many nadi dosha remedies and nadi dosha cancellations.
The type of nadi defines the "Prakriti" of an individual that can be Kaph, Vaat and Pita. In this kaph is for Adi nadi, Vaat is for Madhya and Pita is for Antya Nadi. Now the two persons having same type of nadi must not marry each other as their progeny or children will be weak. This is true scientifically as well. So this is the reason why marriage in a same kin is not allowed. But according to some astrologers instead of nadi dosha, putrakaraka and 5th house that represents children must be checked more accurately than the nadi dosha.
If you have a nadi dosha in horoscope that it can lead to conception but soon there will be a miscarriage or still birth.
Nadi Dosha Exceptions Even if you have this vedic astrological problem you may get the nadi dosha exceptions which include the following points: