Is the fetal human a rights-bearing individual only after viability?

Defining a fetal human as a rights-bearing individual only after viability rests on a standard that cannot consistently ground human rights. Viability is not a property of the unborn child itself, but a measure of what current medical technology can sustain outside the womb. Because technology, geography, and era all affect viability, the same human being can be classified as a “non-individual” or an “individual” depending entirely on external circumstances.

Historically, this instability is clear. In the 1970s, viability was commonly set around 28 weeks due to limited neonatal care. A fetus at 24 weeks at that time would not have qualified as an individual under a viability-based rule. Today, that same 24-week stage of development can be viable, and under the same logic would now count as an individual—despite nothing having changed about the fetus itself. The moral status of a human being, however, cannot reasonably depend on the decade in which they are born or the sophistication of nearby hospitals.

Because viability varies across countries, hospitals, and technological progress, it makes the right to life contingent on external resources rather than intrinsic characteristics. A standard that changes with location and time cannot serve as a principled boundary for who may be intentionally killed and who may not. If medical advances continue to push viability earlier, the criterion becomes a moving target, revealing that it does not identify when a human becomes worthy of protection, but only when others become capable of sustaining them.