Attributions The images of the foam, egg frying are in the public domain. The copyright of the image of the egg yoke and white in the laboratory is held by miya and has been licensed for reuse under a Creative Commons Attribution 3.0 Unported license. The copyright of the image of the two eggs, is held by Guy Courtois and has been shared under a Creative Commons Attribution-Share Alike 4.0 International license. The copyright for the picture of the autumn crocus is held by Jerzy Opioła and has been shared under a Creative Commons Attribution-Share Alike 4.0 International, 3.0 Unported, 2.5 Generic, 2.0 Generic and 1.0 Generic license. The copyright of the image of safron is held by Henna and has been licensed under a CC BY-SA 1.0 license.
Attributions: The image of the caesarian birth has been has been licensed for reuse by HBR under a CC BY-SA 3.0 license. The image of the birth scene is in the public domain on account of it being a picture of an image more than 70 years old. The image of the birth of Jacob and Esau is in the public domain on account of it being a picture of an image more than 70 years old. The image of the placenta has been licensed for re-use by KellyPhD under a Creative Commons Attribution-Share Alike 3.0 Unported license. The image of meconium has been licensed for re-use by Jürgen Schaub under a Creative Commons Attribution-Share Alike 2.0 Generic license.
Attributions: The following images are in the public domain; overcast beach, tiger snarling, wedding rings. The copyright for the image of the moat (Caerlaverock Castle) is held by Simon Ledingham and has been licensed for use under a Creative Commons Attribution-ShareAlike 2.0 license.
Atttribution: The copyright for the image of the baby being fed is held by Anton Nossik had has been released for reuse under a CC BY 3.0 license. The copyright for the image of the weaning is held by Ravedave and has been licensed to be shared under a creative commons Attribution-Share Alike 3.0 Unported license. The image of the letter is in the public domain. The image of the billow is in the public domain.