Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 7 · Samskara Muhurtas
संस्कारमुहूर्ताः
रुग्णा पतिप्रिया दुःखा पुत्रिणी भोगनी तथा ।पतिव्रता केशयुक्ता सूर्यवारादिषु क्रमात् ॥ ३१४ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 314.
Say the first period comes on Sunday, Monday and so on, in order. She may then tend, in turn, to be: often unwell, dear to her husband, prone to sorrow, a mother of sons. Then: one who enjoys comforts, a devoted wife, one who faces troubles.
Simple meaning: The weekday of a girl's first period shows what her later life may be like.
Classical view, not medical advice.
यामाग्निरौद्रभाग्याहिद्वीशेंद्रादिह्युपद्विषाः ।
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.