The oocytes of the superior insects, acquire their nourishment reserves by taking the soluble precursor of the yolk, the vitellogenin, from the haemolymph. The vitellogenin titer in the haemolymph is determined by the balance among the synthesis rate in the fat body and the intake by the oocytes (GIORGI; MAZZINI, 1986). Confirming the participation of the fat body in the vitellogenesis. 
The insect fat body is the principal tissue storing lipids. More than 70% of the dry weight of the tissue are lipids, and most of the lipids are triglicerides. The amount of lipid stored varies depending on the developmental and nutritional state of the insect.

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