Third Trimester: Difference between revisions

From Embryology
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==Introduction==
==Introduction==
 
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:{{Template:Fetal Links}}
:{{Template:Fetal Links}}




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==Third Trimester Timeline==


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* IgG to specific maternal antigens transferred passively across the placenta during the last trimester of pregnancy  
* IgG to specific maternal antigens transferred passively across the placenta during the last trimester of pregnancy  
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| Clinical third trimester
| Clinical third trimester
| [[File:Fetal_weight_change.jpg|100px]] [http://embryology.med.unsw.edu.au/Notes/Ear.htm Sense - Hearing] 3rd Trimester - vibration acoustically of maternal abdominal wall induces startle respone in fetus.
| [[File:Fetal_weight_change.jpg|100px]] [[Sensory_-_Hearing_and_Balance_Development|Hearing]] 3rd Trimester - vibration acoustically of maternal abdominal wall induces startle respone in fetus.


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| <center>28</center>
| <center>28</center>
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| [http://embryology.med.unsw.edu.au/Notes/respire.htm Respire]  Month 7 - respiratory bronchioles proliferate and end in alveolar ducts and sacs  
| [[Respiratory_System_Development|Respire]]  Month 7 - respiratory bronchioles proliferate and end in alveolar ducts and sacs  


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[http://embryology.med.unsw.edu.au/Notes/genital.htm Genital] male gonad (testes) descending  
[[Genital_System_Development|Genital]] male gonad (testes) descending  


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| <center>33</center>
| <center>33</center>
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| [http://embryology.med.unsw.edu.au/Notes/neuron.htm Neural]  brain cortical sulcation - primary sulci present [http://www.ncbi.nlm.nih.gov/pubmed/11158907 PMID:11158907]
| [[Neural_System_Development|Neural]]  brain cortical sulcation - primary sulci present [http://www.ncbi.nlm.nih.gov/pubmed/11158907 PMID:11158907]


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| <center>34</center>
| <center>34</center>
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| [http://embryology.med.unsw.edu.au/Notes/neuron.htm Neural] brain cortical sulcation - insular, cingular, and occipital secondary sulci present [http://www.ncbi.nlm.nih.gov/pubmed/11158907 PMID:11158907]
| [[Neural_System_Development|Neural]] brain cortical sulcation - insular, cingular, and occipital secondary sulci present [http://www.ncbi.nlm.nih.gov/pubmed/11158907 PMID:11158907]


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Revision as of 11:35, 6 September 2010

Introduction

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Fetal Links: fetal | Week 10 | Week 12 | second trimester | third trimester | fetal neural | Fetal Blood Sampling | fetal growth restriction | birth | birth weight | preterm birth | Developmental Origins of Health and Disease | macrosomia | BGD Practical | Medicine Lecture | Science Lecture | Lecture Movie | Category:Human Fetus | Category:Fetal
Historic Embryology  
1940 Fetus Physiology
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Third Trimester Timeline

  • IgG to specific maternal antigens transferred passively across the placenta during the last trimester of pregnancy

(Clinical Week 28-29)

Week
Stage
Event
Clinical third trimester Fetal weight 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
 
30
   

Genital male gonad (testes) descending

31
 
32
   
33
  Neural brain cortical sulcation - primary sulci present PMID:11158907
34
  Neural brain cortical sulcation - insular, cingular, and occipital secondary sulci present PMID:11158907
35
   
36
 
37
   
38
Birth Galletti1770 birth.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

References


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Cite this page: Hill, M.A. (2024, April 25) Embryology Third Trimester. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Third_Trimester

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G