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This is a picture of a human fetus at 20 weeks' gestational age (i.e. 18 weeks after fertilization). A color version of this image is available at Wikimedia here.

See larger version at 3D Pregnancy archive copy at the Wayback Machine. A rotatable 3D version of this photo is available here archive copy at the Wayback Machine, and a sketch is available here archive copy at the Wayback Machine.

The company behind 3DPregnancy.com is Tribal Internet Projects, a Dutch-based publisher of family websites. 3Dpregnancy.com was launched in 2007.[1] archive copy at the Wayback Machine

This particular picture was drawn by Melchior Meijer who is a 3D artist. He and 3Dpregnancy.com used various resources to produce the illustration, including books, DVD's and websites to verify how a fetus looks at this stage of development. Some of the resources relied upon were as follows:

A Child is Born (A book by Lennart Nilsson)

In the Womb (DVD)

In the Womb (Book)

Kidshealth.org (Website)

When comparing this image to other images, it should be kept in mind that this stage of development is often referenced using different numerical descriptions. This is an approximate drawing of a fetus 18 weeks after fertilization, i.e. at the beginning of the 19th week after fertilization. This is equivalent to a gestational age of about 20 weeks, i.e. at the beginning of the 21st week of gestational age. This drawing can be compared to other online images of a fetus at approximately the same stage of development, including the following images:

(1) Photograph of fetus during 18th week after fertilization, from Thomas W. Sadler, Langman's Medical Embryology, page 92 (2006) via Google Books;
(2) Motion-picture archive copy at the Wayback Machine 4D ultrasound of fetus at 19 weeks after fertilization, from the Endowment for Human Development;
(3) Drawing of fetus at 20 weeks’ gestational age, from KidsHealth.org which has a medical review board;
(4) Drawing of fetus at 20 weeks' gestational age, from Michigan Department of Community Health.
Note that during week 11 of gestational age, the eyelids fuse and remain fused until week 24. See Michele Isaacs Gliksman, The Complete Idiot's Guide to Pregnancy and Childbirth, p. 113 (2004).

The owners of this image donated it to Wikimedia. The original version that the owners donated had a watermark which has subsequently been removed according to Wikimedia policy. See here. The present image (without watermark) was donated by Wouter Vergeer <wouter.vergeer@tribal.nl> on Wednesday, August 29, 2007 on behalf of 3DPregnancy.com. Mr. Vergeer stated in an email to Ferrylodge on that date:

This image is now licensed under a "free" license.

This image was converted to black and white, in response to some objections here. The staff of 3D Pregnancy was notified, and provided the following reply (at Mon, 7 Jan 2008 10:55:23):

11:59, 28 August 2007 3dpregnancy (Talk | contribs) 120×120 10 KB Fetus at 20 weeks pregnant. (Fetus is 18 weeks old)

This image has already been uploaded to Wikipedia, and it was recommended to upload it instead to Wikimedia Commons.