ויקרא, פרק י״ב, פסוק ה׳

The birth of a daughter initiates a distinct timeline of spiritual impurity and subsequent purity for the mother, lasting exactly twice as long as the period prescribed for the birth of a son. Following the birth, the mother experiences fourteen days of impurity, succeeded by sixty-six days of relative purity. Because these laws are triggered by the physical act of giving birth rather than the confirmed gender of the child, they apply even when a newborn's gender is ambiguous. In such cases of uncertainty, the stricter approach is adopted, and the mother observes the longer impurity period associated with a female birth [אור החיים, מלבי״ם, תורה תמימה, רלב״ג].

Commentators offer various perspectives on why the timeframes are doubled for a daughter. From a physical standpoint, some suggest that a female birth involves greater physical secretions [ספורנו] and that the mother's bodily recovery takes twice as long [דעת זקנים, רד צ הופמן]. Taking a more historical and spiritual approach, others connect this extended timeframe to the first woman, whose original sin introduced desire and impurity into the reproductive process [שפתי כהן]. Another perspective flips the assumption entirely, suggesting that the longer duration for a daughter is actually the natural, baseline standard for childbirth. When a son is born, God simply shortens the impurity period to a single week so that the mother can be pure in time for her child's circumcision [רד צ הופמן]. Ultimately, there is also the view that these differing timelines are simply a divine decree, beyond the reach of human logic [ביאור יש״ר].

Although there might be an assumption that the initial impurity should last much longer, perhaps up to seventy days, the timeline is deliberately restricted to two weeks. This limitation aligns the mother's status with the familiar laws of standard menstruation [תורה תמימה, מלבי״ם, הכתב והקבלה]. This comparison also establishes the exact nature of her state, clarifying that her impurity is identical in quality to regular menstruation rather than a more severe spiritual condition [תורה תמימה, רד צ הופמן].

During the subsequent sixty-six days, the mother enters a stable, protected status. If she experiences bleeding or complications during this timeframe, she remains in her state of purity, and the blood is considered pure [תורה תמימה, מלבי״ם, אדרת אליהו]. At the same time, this period requires a degree of restraint. While she may resume normal marital relations, she must hold back from touching holy objects or entering the sanctuary [טור הארוך, ביאור יש״ר]. Throughout this phase, she remains fully subject to the specific boundaries and warnings of the purity days [העמק דבר], with the underlying acknowledgment that she might not always complete the full timeframe in practice, such as in the event of a miscarriage [טור הארוך].