In the eighteenth and nineteenth centuries, a woman convicted of a capital crime could claim a delay in her execution if she were pregnant; a woman who did so was said to “plead the belly”. In Ireland on 16 March 1831 Baron Pennefather in Limerick stated that pregnancy was not alone sufficient for a delay but there had to be quickening. (To be able to feel the movement of the foetus)
The plea (Pleading the belly) was available at least as early as 1387 and was eventually rendered obsolete by the Sentence of Death (Expectant Mothers) Act 1931, which stated that an expecting mother would automatically have her death sentence commuted to life imprisonment with hard labour.
A comment by The Catholic Church points us to ultrasound and to the irrelevance of quickening nowadays
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