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Carnegie Stage Section
L-4 spinal ganglion, L-5 spinal ganglion, L-5 ventral primary ramus, ala of sacrum, anal fold, anal pit, extensor digitorum tendon, levator ani muscle, metatarsophalangeal joint, neural canal, pelvic plexus, pudendal nerve, rectum, sacro-iliac joint, sciatic nerve, sympathetic trunk
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Carnegie Embryo #4090   |   Location: 23-17

Keywords: L-4 spinal ganglion, L-5 spinal ganglion, L-5 ventral primary ramus, ala of sacrum, anal fold, anal pit, extensor digitorum tendon, levator ani muscle, metatarsophalangeal joint, neural canal, pelvic plexus, pudendal nerve, rectum, sacro-iliac joint, sciatic nerve, sympathetic trunk

Source: The Virtual Human Embryo.