तेषां खल्वेषां भूतानां त्रीण्येव बीजा-नि भवन्त्याण्डजं जीवजमुद्भिज्जमिति ॥
In plain words
Of these created beings, there are precisely three origins: the egg-born, the womb-born, and the sprout-born.
Close to the Sanskrit
Of these indeed of those beings, there are three seeds only: egg-born, life-born, and sprout-born.