Laqiḥat al-nāqah is used for a she-camel becoming pregnant. Kishāfan indicates conception or calving at unusually close intervals. Tutʾim belongs to the root w-ʾ-m and refers to giving birth to twins.
The camel is not an actual animal on a battlefield. The full biological image is a metaphor for the repeated generation of fresh disasters. Verse 31 extends that picture by describing the ominous character of the offspring.