Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 2 · Signs, Planets, Birth
जातकम् १
पितुः परोक्षे जन्मस्यादिन्दौ लग्नमपश्यति ॥ ६८ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 55, verse 68.
Birth is in the father's absence when the Moon does not see the lagna (rising sign).
Simple meaning: When the Moon does not see the lagna, the child is born while the father is away.
मध्याद्भ्रष्टेर्के विदेशस्थे जननेनारिजन्म वै ।
The Sun past the 10th, Saturn in the lagna, or Mars in the 7th can mean the father is away.
चतुष्पदर्क्षगे भानौ शेषैर्बलयुतैः खगैः ।
The Sun in a four-footed sign with strong planets can give twins in one sac.
सार्क्यारसिंहोज्ञाजांसे भांशतुत्यांगनालयुक् ।
A lagna in Leo, Taurus or Aries navamsha with Saturn or Mars can mean the cord wraps a limb.