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| | [[Template:Hearing timeline table|hearing timeline]]<noinclude>[[Category:Template]][[Category:Term Link]][[Category:Timeline]][[Category:Hearing]][[Category:Third Trimester]][[Category:Fetal]]</noinclude> |
| |+ Colspan=2|Hearing Timeline
| |
| |-bgcolor="CEDFF2"
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| ! width=200px|Stage
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| ! Event
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| |-
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| | Week 9
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| | Mesenchyme surrounding membranous labryinth (otic capsule) chondrifies.
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| |-bgcolor="F5FAFF"
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| | Week 12-16
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| | Capsule adjacent to membranous labryinth undegoes vacuolization to form a cavity (perilymphatic space) around membranous labrynth and fills with perilymph. | |
| |-
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| | Week 18
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| | ectodermal plug in external auditory meatus breaks down.
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| |-bgcolor="F5FAFF"
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| | Week 16-24
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| | Centres of ossification appear in remaining cartilage of otic capsule form petrous portion of temporal bone. Continues to ossify to form mastoid process of temporal bone.
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| |-
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| | Week 18 - 22
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| | Organ of corti structural elements develop. ({{GA}} 20 - 24 weeks)
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| |-bgcolor="F5FAFF"
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| | 26 weeks
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| | human brainstem auditory pathway is anatomically formed.
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| |-
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| | 28 weeks
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| | AABR can be recorded.
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| |-bgcolor="F5FAFF"
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| | 3rd Trimester
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| | Vibration acoustically of maternal abdominal wall induces startle response in fetus.
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| |-
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| | Colspan=2|'''Links:''' {{hearing}} | {{timeline}}
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| |}<noinclude>[[Category:Template]][[Category:Timeline]][[Category:Hearing]][[Category:Third Trimester]][[Category:Fetal]]</noinclude>
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