TT #40 · Parshas Tazria · Aliyah 1 · Passuk 5
English: If she bears a female, she shall be impure two weeks as during her menstruation, and she shall remain in a state of blood purification for sixty-six days.
Chabad.org — Chumash, English translation + Rashi for Vayikra 12:5
Torah Temimah cites Niddah 36b.
E-Daf — Niddah 36b · Shas.org — Niddah 36b · Steinsaltz Center — Niddah 36b
English: “As in her menstrual impurity,” but not as in her zavah status; thus the blood of the difficult labor during zavah days is pure.
Textual comparison
The phrase “as in her menstrual impurity, but not as in her zavah status” teaches that blood during difficult labor in the days of zavah is treated as pure.