Astanga Hrudaya
बीजात्मकैर्महाभूतैः सूक्ष्मैः सत्वानुगैश्च सः। मातुश्चाहाररसजैः क्रमात्कुक्षौ विवर्द्धते॥२॥
Growth of embryo composed of subtle elements and soul, nourished by mother: The embryo formed from the causative and subtle mahabhutas (prithvi, ap, tejas, vayu and akasa i.e. earth, water, fire, air and ether respectively) followed by (later associated with) satva (soul) graduall grows in the womb of the mother, nourished by the essence of the food of the mother.
english translation
bIjAtmakairmahAbhUtaiH sUkSmaiH satvAnugaizca saH। mAtuzcAhArarasajaiH kramAtkukSau vivarddhate॥2॥
hk transliteration by Sanscript