Image:9-Week Human Embryo from Ectopic Pregnancy.jpg

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[edit] Summary

Description

9-Week Human Embryo from Ectopic Pregnancy (7th week p.o.)

The size and anatomic features suggest development equivalent to a nine-week pregnancy (or seven weeks post ovulation). In obstetrics, pregnancy is dated from the first day of the last menstrual period, which is about two weeks prior to the ovulation that resulted in the pregnancy.

For the photo, I immersed the formalin-fixed specimen in absolute alcohol (which, because of its low specific gravity, allows the specimen to firmly sink to the bottom of the dish and not float around). I shot the picture with an expensive Nikon D2X, but I used an old, worn, cheap Nikkor f/4 manual-focus 105mm macro lens, courtesy of the eBay shopping experience. In this case, I added a Nikkor 1.4X tele-converter, which gave me just the right image size and working distance. The picture would have been fine without the tele-converter, requiring just a little mote cropping.

The original image was a bit dull-looking, so I tweaked up the highlights in the very useful (and free) Picasa program, available from Google.

Source

http://www.flickr.com/photos/euthman/548063929/

Date
Author

Ed Uthman, MD

Permission
(Reusing this image)

CC-BY-SA 2.0

Other versions Image:Embryo 9 Wochen mit Groessenvergleich.JPG

[edit] Licensing

Creative Commons License
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This file is licensed under Creative Commons Attribution ShareAlike 2.0 License (cc-by-sa-2.0). In short: you are free to share and make derivative works of the file under the conditions that you appropriately attribute it, and that you distribute it under this or a similar cc-by-sa license.
This image was originally posted to Flickr by euthman at http://flickr.com/photos/78147607@N00/548063929. It was reviewed on 18:40, 1 April 2008 (UTC) by FlickreviewR, and confirmed to be licensed under the terms of the cc-by-sa-2.0.

File history

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current20:31, 14 June 2007683×1,024 (242 KB)Patho (== Summary == {{Information |Description='''9-Week Human Embryo from Ectopic Pregnancy''' The size and anatomic features suggest development equivalent to a nine-week pregnancy (or seven weeks post ovulation). In obstetrics, pregnancy is dated from the f)
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