Spiders lay eggs, which are usually wrapped in silk bags. Females protect and carry egg bags in different ways, or put them on the net, under rocks, on branches, or put them in their mouths and breasts. For incomplete metamorphosis, the abdomen is still segmented in embryonic stage, and whether there is a net or not is alive. There are circular nets, dish nets, funnel nets, triangular nets and irregular nets.
The growth of spiders will go through molting many times, from eggs to larvae to adults in the process of molting.