Nadi dosha
Nadi dosha arises in Kundli matching when both partners’ birth nakshatras belong to the same nadi, scoring 0 of 8 points. It is taken seriously, but classical texts list several cancellations.
Also known as: Nadi dosh, Naadi dosha
The full guide: Nadi Dosha in Kundli Matching: Meaning and Cancellation
Nadi dosha is the zero in the Nadi koota, the most heavily weighted of the eight. Tradition links it with health and children, so families often ask about it first. Because about one couple in three shares a nadi, it comes up often.
The main classical exceptions are: the same Moon sign but different nakshatras; the same nakshatra but different Moon signs (possible for stars such as Krittika or Punarvasu that span two signs); or the same nakshatra in different padas. Some traditions also relax it when the two Moon-sign lords are the same or friends. Our matching applies the first three, and its verdict does not recommend a match while an uncancelled Nadi dosha stands, however high the score.
Popular articles sometimes link Nadi dosha with blood groups or genetics. That is a modern idea, not part of the tradition, and it is no substitute for medical advice.
Nadi dosha is one factor in one method. The couple’s whole charts, and their own judgement, matter more, so ask a qualified astrologer to review it before any decision.