Nadi is one of the important Kootas in matching Gunas for the purpose of marriage in Vedic Astrology. It indicates health compatibility and out of the maximum of 36 points in a marital match has been allocated the highest number of 8 points. The very fact that Nadi has been given maximum points also signifies that it is regarded as the most important factor by astrologers. The Nadi mainly shows the success of marital life and about the progeny in the future. It is a very serious imperfection which is potent enough to cause many problems in the married life of two partners. If the native ignores this advice and decides to proceed with the marriage anyway, the resultant issues range from the couple feeling low to no attraction towards each other, in some cases in separation, certain serious health-related issues, infertility, serious life-threatening situations for mother or child during or after birth of child and could even result in the death of the partner. This is why it is undoubtedly the most feared Dosha among all defects which are formed during the process of Guna Milan. Nadi is determined by the placement of the Moon in the natal chart and the Nakshatra in which the Moon is placed for the individual, at the time of birth. Following is the distribution of Nadis according to Vedic astrology as decided by the presence of Moon in specific Nakshatras in the birth charts of different natives: If Moon is placed in any of these 9 Nakshatras named Ashwini, Ardra, Punarvasu, UttaraPhalguni, Hasta, Jyeshtha, Moola, Shatabhisha or Poorvabhadrapada in a horoscope, the native is said to have Adi Nadi If Moon is placed in any of these 9 nakshatras named Bharani, Mrigasira, Pushya, PoorvaPhalguni, Chitra, Anuradha, Poorvashada, Dhanishtha or UttaraBhadrapada in a horoscope, the native is said to have Madhya Nadi If Moon is placed in any of these nakshatras named Krittika, Rohini, Ashlesha, Magha, Swati, Vishakha, Uttarashada, Shravana or Revati in a horoscope, the native is said to have Antya Nadi