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

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Description
English: 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 freeware Picasa program, available from Google.
Español: Embrión humano de 9 semanas del embarazo ectópico

El tamaño y las características anatómicas sugieren un desarrollo equivalente a un embarazo de nueve semanas (o siete semanas después de la ovulación). En obstetricia, el embarazo está fechado desde el primer día del último período menstrual, que es aproximadamente dos semanas antes de la ovulación que resultó en el embarazo.

Para la foto, se sumergió la muestra fijada con formalina en alcohol absoluto (que, debido a su baja gravedad específica, permite que la muestra se hunda firmemente en el fondo del plato y no flote).

Se grabó la imagen con una costosa Nikon D2X, pero utilizando una lente macro de 105mm de foco manual Nikkor f/4, vieja y gastada y barata, cortesía de eBay por la compra. En esta situación, se agregó un teleconvertidor Nikkor 1.4X, que proporcionó el tamaño de imagen y la distancia de trabajo correctos. La imagen resultante quedó bien, requiriendo sólo un pequeño recorte.

La imagen así resultante resultó ser poco significativa y explicativa, así que se modificaron los aspectos más destacados de la misma con el muy útil programa 'freeware' de Picasa, disponible en Google.
Date
Sabji 9-Week Human Embryo from Ectopic Pregnancy
Author Ed Uthman from Houston, TX, USA
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(Reusing this file)		 CC BY 2.0

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This image was originally posted to Flickr by euthman at https://www.flickr.com/photos/78147607@N00/548063929. It was reviewed on 17 ly. xa 2013 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

17 ly. xa 2013

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depicts English

copyright status English

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captured with English

Nikon D2X English

zbasu detri

1 ly. pa re 1999

exposure time English

0.25 snidu

f-number English

8

focal length English

105 miltre

ISO speed English

100

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image/jpeg

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b591cee0ad60a6024163703a6dee19d36e573a8b

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2,606,083 byte

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3,081 pixel

width English

2,054 pixel

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detytcikaThumbnailDimensionspilnopinka
cabna12:10, 17 ly. xa 2013Thumbnail for version as of 12:10, 17 ly. xa 20132,054 × 3,081 (2.49 MB)Jacopo WertherOriginal High-resolution image with EXIF Data
20:31, 14 ly. xa 2007Thumbnail for version as of 20:31, 14 ly. xa 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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