The conclusion of Sarah's abduction reveals a severe medical crisis that struck the Philistine palace, acting as both a punishment and a divine shield. The full extent of this physical distress only becomes apparent retroactively, after the healing takes place. Since an inability to give birth is not an immediate, visible phenomenon, it was only when Abraham prayed and the women resumed having children that everyone understood the stoppage was no mere coincidence, but a direct divine decree [העמק דבר].
Commentators present two primary ways to understand the nature of this affliction. One approach suggests the plague focused exclusively on the reproductive system. God removed Abimelech's physical ability and desire to be intimate with his wives, ensuring he would not mistakenly attribute his sudden lack of attraction to Sarah being unappealing [שד״ל]. Simultaneously, the women of the palace were struck with barrenness [ביאור יש״ר], and those who were already pregnant found themselves unable to give birth [טור הארוך]. The intensity of the affliction was severe [תורה תמימה], though the events were recorded delicately out of respect for royalty and for Sarah herself [טור הארוך, רבנו בחיי, ביאור יש״ר]. Ultimately, had Abimelech failed to repent, this condition would have been fatal [ספורנו].
A broader perspective views the affliction as a complete blockage of every bodily opening [רש״י]. According to this understanding, every member of the household suffered an absolute inability to relieve themselves, experiencing a stoppage of all bodily waste and reproductive fluids [רבנו בחיי, רלב״ג, תורה תמימה, מחוקקי יהודה]. This sweeping plague did not spare the animals of the estate, reaching such an extreme that even the chickens stopped laying eggs [רד״ק, רבנו בחיי, תורה תמימה].
The specific nature of this punishment served a dual purpose. First, it protected Sarah's reputation. Knowing that she was destined to conceive immediately following this ordeal, cynics might have claimed that Abimelech was the father. By sealing the bodies of the palace inhabitants and striking them with absolute barrenness, God provided undeniable proof that Abimelech had never touched her, since his entire nation suffered from the very same physical blockage [אור החיים, אלשיך, שפתי כהן]. Second, this crisis paved the way for a personal miracle for Abraham and Sarah. God brought upon Abimelech the exact hardship of barrenness that Abraham himself faced, compelling Abraham to pray on the king's behalf. Following the spiritual principle that one who prays for another's needs is answered first if they share the same need, Abraham's prayer for the Philistine palace directly resulted in Sarah finally conceiving [אור החיים, פרדס יוסף].
The suffering brought upon the palace was a direct consequence of the harm caused to Sarah, demonstrating that those who harm individuals backed by the power of the Torah are struck by its defense [העמק דבר]. Furthermore, since God had already intervened to prevent Abimelech from actually committing a sin, this additional, severe plague on the household did not occur automatically. Rather, it was enacted by Sarah's direct word and command [רש״י, שפתי חכמים, משכיל לדוד, פרדס יוסף].