'Womb,' as in Genesis 49:25, signifies the conjunction of good and truth. The term 'belly' is used where truths are being discussed, and the term 'womb' where good is discussed. 'An abortive womb' signifies falsities from evil in the place of truth from good.

(Odkazy: Arcana Coelestia 4918, 6433)

The 'Harvest,' as mentioned in Mark 4:29, signifies the increase of the church in general and particular.

In Joel 3:13, it signifies the last state of the church before it has been devastated from all good and truth.

'A harvest' symbolizes the state of the church with respect to Divine truth. The reason is that a harvest yields the grain used to make bread, and grain and bread symbolize the church's goodness, which is achieved through truths.

(Odkazy: Apocalypse Revealed 645; Joel 3; Mark 4)