Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 2 · Signs, Planets, Birth
जातकम् १
शुक्रार्केंदुजैः स्वांशस्थैरीज्य चांगत्रिकोणगे ।भवेदपत्यं विप्रेंद्र पुंसां सद्वीर्यशालिनाम् ॥ ४३ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 55, verse 43.
Venus, the Sun and Mercury stand in their own navamsha (one-ninth part of a sign). And Jupiter is in the lagna (rising sign) or a trikona (luck house). Then men of good seed have children, O best of brahmins.
Simple meaning: Venus, Sun and Mercury in own navamsha, and Jupiter in the lagna or a luck house, give children.
अस्त्रेऽर्केंदो कुजार्की चेत्पुंस्त्रियोरामयप्रदौ ।
Mars and Saturn in the 7th from the Sun and Moon can bring a couple illness. Other placements may risk their lives.
शुक्रार्कौ मातृपितरौ दिवा नक्तं शशीनजौ ।
By day Venus and Sun stand for the mother and father. By night the Moon and Saturn do.
पापदृष्टे शुभे क्षीणे तुंगे वा लग्नगे यमे ।
Saturn in the lagna seen by a waning Moon and Mars may put the pregnant woman's life at risk.