1. How is it that a woman giving birth to a Zachar makes her Tum'ah for only seven days while birthing a N'qievah lasts a fortnight?
2. What is uvayom hashmini yimol b'sar orlato doing here?
The Brith Millah on the 8th day shortens the woman's condition either due to:
A. The Torah gave her dispensation to attend the Brit
B. The healing power of the mal'ach habbrit mitigates the damage she suffers, thereby "commuting her sentence to time served."