Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 7 · Samskara Muhurtas
संस्कारमुहूर्ताः
क्रूरग्रहाणामेकोपि लग्नादंत्यात्मजाष्टगः ।सीमंतिनीं वा तद्गर्भं बली हंति न संशयः ॥ ३२५ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 325.
Even one strong cruel planet can be a danger. Say it stands in the 12th, 5th or 8th house from the lagna (rising sign). It may then put the life of the pregnant woman or her unborn child at risk.
Simple meaning: A strong cruel planet in the 12th, 5th or 8th house can harm the mother or the child.
तस्मिञ्जन्ममुहूर्तेऽपि सूतकांतेपि वा शिशोः ।
The birth rite is done at the birth hour or when the birth impurity ends, after honouring the ancestors.
सूतकांते नामकर्म विधेयं तत्कुलोचितम् ।
Name the child when the impurity ends, in the way the family follows.
देशकालोपघाताद्यैः कालातिक्रमणं यदा ।
If the time is missed, do the rite when Venus and Jupiter are visible and the Sun moves north.