File:Placental mean weight graph01.jpg

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Mean for Placental Weight by Gestational Age

Increase in placental weight by birth gestational age GA.

Data: Medical Birth Registry of Norway (1999–02) graph based on data within PMID 17516963.

Norwegian Society of Obstetrics and Gynaecology guideline "the placenta should preferably be weighed without the cord and membranes" (not identified whether this has been observed.

The weight is dependent on the amount of intervillous blood and blood in fetal vessels, and is reduced by about 50 g in weight after some postnatal hours.


Links: placenta | Fetal Development


American College of Obstetricians and Gynecologists Committee (PMID 24150030 2013 Opinion no 579) recommended that "term" be replaced with the more specific terminology related to gestational age:

  • early term - 37 0/7 weeks of gestation through 38 6/7 weeks of gestation.
  • full term - 39 0/7 weeks of gestation through 40 6/7 weeks of gestation.
  • late term - 41 0/7 weeks of gestation through 41 6/7 weeks of gestation.
  • postterm - 42 0/7 weeks of gestation and beyond.

Reference

Thompson JM, Irgens LM, Skjaerven R & Rasmussen S. (2007). Placenta weight percentile curves for singleton deliveries. BJOG , 114, 715-20. PMID: 17516963 DOI.



Cite this page: Hill, M.A. (2024, May 20) Embryology Placental mean weight graph01.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Placental_mean_weight_graph01.jpg

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

File history

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Date/TimeThumbnailDimensionsUserComment
current14:02, 6 June 2016Thumbnail for version as of 14:02, 6 June 20161,500 × 1,200 (114 KB)Z8600021 (talk | contribs)added full term box
13:50, 6 June 2016Thumbnail for version as of 13:50, 6 June 20161,500 × 1,200 (106 KB)Z8600021 (talk | contribs)