Since you are a Christian, fyi, the Bible considers seminal discharge, menstrual discharge and period, pregnancy and child-birth as unclean = evil/satanic.?; and unconverted people as sons/daughters of the devil who often do as their father, Satan, spiritually tells them to do.

So, pregnancy cravings are likely spiritually from the devil/serpent/Satan through humans' inherited Adam's Original Sin. Such devilish cravings should be ignored as much as possible by both mother and father, instead of being satisfied.
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