Srimad Bhagavatam Canto 06, Chapter 14, Text 31

SB 6.14.31

tasya anudinam garbhah
 sukla-paksa ivodupah
vavrdhe surasenesa-
 tejasa sanakair nrpa
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
After receiving semen from Maharaja Citraketu, the King of Surasena, Queen Krtadyuti gradually developed in her pregnancy, O King Pariksit, just as the moon develops during the bright fortnight.
Srimad Bhagavatam Canto 06, Chapter 14, Text 30
Srimad Bhagavatam Canto 06, Chapter 14, Text 32