| fetal | Of or pertaining to a foetus, pertaining to in utero development after the embryonic period. (18 Nov 1997) |
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| viability | The quality or state of being viable. Specifically: The capacity of living after birth. The capacity of living, or being distributed, over wide geographical limits; as, the viability of a species. Source: Websters Dictionary (01 Mar 1998) |
| viability test | <investigation> Test to determine the proportion of living individuals, cells or organisms, in a sample. Viability tests are most commonly performed on cultured cells and usually depend on the ability of living cells to exclude a dye, (an exclusion test) or to specifically take it up (inclusion test). (18 Nov 1997) |
| foetal viability | <obstetrics> The potential of the foetus-in-utero to survive after birth. (12 Dec 1998) |