Developmental changes in the intraplacental distribution of placental lactogen and alkaline phosphatase in the rat

M. J. Soares

doi:10.1530/jrf.0.0790093

Jump to Content

Developmental changes in the intraplacental distribution of placental lactogen and alkaline phosphatase in the rat

in Reproduction

Author:

M. J. Soares

M. J. Soares
Search for other papers by M. J. Soares in
Current site
Google Scholar
PubMed

View More View Less

DOI:: https://doi.org/10.1530/jrf.0.0790093

Volume/Issue:: Volume 79: Issue 1

Page Range:: 93–98

Article Type:: Research Article

Online Publication Date:: Jan 1987

Free access

Download PDF

Summary. The junctional and labyrinth regions of the rat chorioallantoic placenta during the second half of gestation showed different patterns of development with regard to DNA, protein, placental lactogen and alkaline phosphatase content. DNA and protein measurements indicated that growth of the labyrinth region was more rapid and persisted for longer during gestation than did growth in the junctional zone. At midpregnancy the junctional zone was the main source of placental lactogen whereas by late pregnancy both regions contributed considerable amounts. On Day 20 of gestation the labyrinth region contained significantly more placental lactogen than did the junctional zone. Alkaline phosphatase activity was predominant in the labyrinth zone throughout the second half of gestation. The results indicate that the chorioallantoic placenta is composed of two functionally distinct regions.

Reproduction is committed to supporting researchers in demonstrating the impact of their articles published in the journal.

The two types of article metrics we measure are (i) more traditional full-text views and pdf downloads, and (ii) Altmetric data, which shows the wider impact of articles in a range of non-traditional sources, such as social media.

More information is on the Reasons to publish page.