It is the first auspicicious event(out of five) of the life of Tirthankar Bhagwan. The mother of Tirthankar sees 16 dreams when Tirthankar child comes in her pious womb.Kuber showers crores of jewel in the courtyard of of mother everyday starting from six month before the conception upto the birth i.e. for 15 month continously. Because Tirthankar Bhagwan will never come again into the womb in future so it is called GarbhKalyanak