• Video 1 Multipolar spindle during the first division of the mouse zygote.
• Video 2 Live imaging of the mouse zygote during the first division.
• Video 3 Live imaging of the dynein-inhibited mouse zygote during the first cleavage.
• Video 4 Live imaging of the kinesin-5–inhibited mouse zygote during the first cleavage.
• Video 5 Tracking of MTOCs during the first division.
• Video 6 >Tracking of MTOCs in the dynein-inhibited mouse zygote during the first cleavage.
• Video 7 Tracking of MTOCs in the kinesin-5–inhibited mouse zygote during the first cleavage.
• Video 8 Live imaging of the mouse embryo during the second division.
• Video 9 Live imaging of the mouse embryo during the fourth division.