preferred_name: Fertilized zygotes initiate cleavage but arrest at 2-cell to 6-cell stage
preferred_name_lc: fertilized zygotes initiate cleavage but arrest at 2-cell to 6-cell stage
label: Fertilized zygotes initiate cleavage but arrest at 2-cell to 6-cell stage
label_lc: fertilized zygotes initiate cleavage but arrest at 2-cell to 6-cell stage