Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 7 · Samskara Muhurtas
संस्कारमुहूर्ताः
यामाग्निरौद्रभाग्याहिद्वीशेंद्रादिह्युपद्विषाः ।तारका न हिता मासा मधूर्जशुचिपौषकाः ॥ ३१५ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 315.
These stars are not good: Bharani, Krittika, Ardra, Purva Phalguni, Ashlesha, Vishakha, Jyeshtha and the like. The months Chaitra, Kartika, Ashadha and Pausha are not good.
Simple meaning: A first period on some stars or in some months is not good.
भद्रा च संक्रमो निद्रा रात्रिश्चंद्रार्कयोर्ग्रहः ।
A first period at these bad times may lead to a woman who goes astray.
आद्या निशश्चतस्रस्तु त्याज्या ह्यपि समाः परैः ।
Skip the first four nights after the period. Prefer the Moon in an odd sign and male planets looking at the lagna.
उपवीती युग्मतिथावनग्नः कामयेत्स्त्रियम् ।
A man who wants a son should keep to even moon days and avoid four stars.