Bhagavatapurana 3.31.4

3.31.4

caturbhir dhātavaḥ sapta pañcabhiḥ kṣut-tṛḍ-udbhavaḥ /
ṣaḍbhir jarāyuṇā vītaḥ kukṣau bhrāmyati dakṣiṇe //

4. At the end of four months (the fourth month) the seven Dhātus or forms of matter become differentiated; in five months, hunger and thirst make their appearance; at the end of six months (the sixth month) it is covered with a (an external) skin (called jarayu) and in the right side of the abdomen it begins to turn (to be in a state of motion).