Sentence:  The sunne-beames bright vpon her body playd, / Being through former bathing mollifide, / And pierst into her wombe, where they embayd / With so sweet sence and secret power vnspide, / That in her <WSD>pregnant</WSD> flesh they shortly fructifide. 
Meaning of the word marked with <WSD> tags:  Fertile, prolific (usually of soil, ground etc.).