http://thinkgene.disqus.com/a bio blog about genetics, genomics, and biotechnologyenTue, 15 Apr 2008 20:47:19 -0000http://www.thinkgene.com/clues-to-ancestral-origin-of-placenta-emerge-in-stanford-study/#comment-2463785Yes, that is correct. The placenta is from the fetus. However, since it integrates with the mother and also becomes part of her body, I would say that it's just as much the mother's organ as it is the fetus's; it just has the genotype of the fetus. I'm not an expert in this field, so I don't know if other scientists actually consider it to be the mother's organ.Josh HillTue, 15 Apr 2008 20:47:19 -0000http://www.thinkgene.com/clues-to-ancestral-origin-of-placenta-emerge-in-stanford-study/#comment-2463784"It is the only organ to develop in adulthood" - but it's an organ of the fetus, no? it's genetically the fetus's.<br><br>i assumed with multiple placental mammal births that each fetus had its own placenta. is that not true?rosemaryTue, 15 Apr 2008 20:38:24 -0000