With progression of pregnancy, a marked alteration in overall number of antennae per N-glycan was observed (Figure 3, top row). During pregnancy, within the complex type glycans (C), the relative abundance of tri- and tetraantennary N-glycans (CA3, CA4) showed to increase at the expense of diantennary species (CA2) (βCA2 = −1.05 SE ± 0.06; βCA3 = 1.08 ± 0.06; βCA4 = 0.70 ± 0.06), followed by a slow recovery after delivery (βCA2 = 0.94 ± 0.07; βCA3 = −0.98 ± 0.07; βCA4 = −0.56 ± 0.08; Table S4 in Supplementary Material).