Template talk:Third Trimester Timeline

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Third Trimester Timeline
human timeline | first trimester timeline | second trimester timeline | third trimester timeline
Week
Stage
Event
Clinical third trimester (GA Clinical Week 28) Third Trimester Fetal size change.jpg Hearing 3rd Trimester - vibration acoustically of maternal abdominal wall induces startle respone in fetus.
27
 
28
  Respire Month 7 - respiratory bronchioles proliferate and end in alveolar ducts and sacs
29
 

[[Integumen tary System - Tooth Development|Tooth Development]] Week 29 - Permanent premolars (correspond to the milk molars) appear.

30
   

Genital male gonad (testes) descending

31
 
32
  Nail Development fingernails reach digit tip
33
  Neural brain cortical sulcation - primary sulci present[1]
34
  Neural brain cortical sulcation - insular, cingular, and occipital secondary sulci present[1]
35
   
36
  Frazer006 bw600.jpg Nail Development toenails reach digit tip

Lens Development - lens growth and interocular distance plateaus after 36 weeks of gestation[2]

37
   
38
Birth Newborn.jpg Clinical Week 40

Heart pressure difference closes foramen ovale leaving a fossa ovalis

Thyroid TSH levels increase, thyroxine (T3) and T4 levels increase to 24 h, then 5-7 days postnatal decline to normal levels

Adrenal - zona glomerulosa, zona fasiculata present

  1. 1.0 1.1 <pubmed>11158907</pubmed>
  2. <pubmed>19541779</pubmed>