The Compendium of Caraka 4.2.9

4.2.9

tadagnisūryaśramaśokarogairuṣṇānnapānairathavā pravṛttam/
dṛṣṭvā 'asṛgekaṃ na ca garbhasaṃjñaṃ kecinnarā bhūtahṛtaṃ vadanti//

Seeing that blood flow forth due to fire, sun, fatigue, grief, disease, or hot food and drink, / and not seeing anything that can be called an embryo, some men say it was taken by evil spirits.