Putra yoga is a combination of planetary positions in a person's birth chart or Kundali that indicates the possibility of having children prediction. In a couple's Kundalis, Putra yoga is determined by examining the placement of Jupiter, the fifth house, and its lord, as well as the placement and strength of the Sun and Moon. For more info visit: https://www.quora.com/How-is-Putra-yoga-determined-in-a-couples-kundalis/answer/Marriage-Astro