CACNA1A and spontaneous abortion: The migration speeds of mNPBs in patients with miscarriages or biochemical pregnancy were significantly slower than in patients with LB (FHM+/LB− 3.19 ± 0.36 μm/h, GS+/FHM− 3.27 ± 0.45 μm/h, hCG +/GS− 3.44 ± 0.45 μm/h, vs. LB 4.24 ± 0.93 μm/h, p ≤ 0.003) (Figure 6A).