Few horoscopes are vetoed. There are 14 sins mentioned in Bhrutapashari manuscript (granth). Few of them are:
If one is vetoed by Pitrushap, Pratashap or Sarpashap he does not bear child. If he does have children they do not survive. The above mentioned sins are explained based on horoscope If there is Rahu in the fifth place of your birth chart (JanmaKundali) or Panchamesh or there is unison between Rahu and Jupiter (Jupiter (Guru)), also if Jupiter (Guru) is vetoed by Sinful Planet and Rahu-Jupiter (Guru) is placed in the (Dhan-Meen) Sagittarius-Pisces Zodiac sign or below mentioned Yog is there then for longevity of their child or to bear a child one must perform Narayannagbali or Nagbali.