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  • Human saliva displaying ferning. During the fertile phase of a woman's menstrual cycle an oestrogen surge causes salt crystals to appear in the saliva. When viewed under the microscope the crystalline salt structure resembles fern leaves and can be used as an indication of a woman's increased chances of conceiving at this time.
  • Human saliva displaying ferning. During the fertile phase of a woman's menstrual cycle an oestrogen surge causes salt crystals to appear in the saliva. When viewed under the microscope the crystalline salt structure resembles fern leaves and can be used as an indication of a woman's increased chances of conceiving at this time.
  • Human saliva displaying ferning. During the fertile phase of a woman's menstrual cycle an oestrogen surge causes salt crystals to appear in the saliva. When viewed under the microscope the crystalline salt structure resembles fern leaves and can be used as an indication of a woman's increased chances of conceiving at this time.
  • Trifolium rubens L. Leguminosae. [Note the Family Leguminosae is preferred over Family Fabaceae as the former allows all the legumes to be in one Family and not three - one Family being the current consensus among botanists]. Red Feather Clover. Distribution: Europe. The white clover, Trifolium repens, is listed as a treatment for arthritis by Linnaeus (1782). This and Trifolium pratense, Red Clover, are the ones most used for pastures. All the clovers have root nodules which fix nitrogen from the air into the soil so have an important role in ensuring soil fertility. Trifolium rubens has the same nitrogen fixing ability, and is used as an ornamental garden plant where it still acts to improve fertility. Photographed in the Medicinal Garden of the Royal College of Physicians, London.
  • Nepal; Kathmandu Valley, 1986. The Kathmandu Valley is situated in Nepal's Hill Region ('Pahar' in Nepali - altitutides 1000-4000 metres), and is the country's most fertile and urbanised area as well as being its political and cultural centre. The hills, sculpted into a vast complex of terraces, are extensively cultivated. Hill farmers produced food staples, mostly rice and corn, although this is still a food-deficit area. Other crops include wheat, millet, barley, sugarcane, tobacco, potatoes and oilseed. The climate is mild with summer temperatures reaching 30 degrees C and winter temperatures about 10 degrees C. The most common trees are oak, alder, jacaranda and rhododendron.
  • De la grossesse et accouchement des femmes, du gouvernement dicelles et moyen de survenir aux accidents qui leur arrivent, ensemble de la nourriture des enfans / Par Jacques Guillemeau. Reveu [sic] et augmenté de figures en taille douce, et de plusieurs maladies secrettes. Avec un traitte de l'impuissance, par Charles Guillemeau.
  • Diana of the Ephesians (Ephesian Artemis), with a shepherd boy playing pipes. Etching by P.A. Novelli.
  • Nymphs in a field among cornucopias; workers scythe wheat; representing horticulture and agriculture. Stipple engraving by J. Chapman, c. 1810, after H. Corbould.
  • Saint Joseph. Line engraving by C. Mellan.
  • An operation to collect eggs from a woman for in vitro fertilisation. Lithograph by Virginia Powell, 1997.
  • A hairy green male stamen heading from the right towards a deep red rose in full bloom representing 'Love Question No 345', which asks how crazy are you if your summer passion is unprotected; one of a series of safe sex AIDS prevention advertisements by Folkhälsoinstitutet, RFSU and RFSL. Colour lithograph by Garbergs, ca. 1995.
  • Sarasvati sitting on lotuses plying her vina. Watercolour drawing.
  • A red orchid open wide to reveal a phallic looking erect yellow stamen representing 'Love Question No 266', Carl Lewis runs 100 meters in 9.86 seconds - how quickly can you get a condom on?; one of a series of safe sex AIDS prevention advertisements by Folkhälsoinstitutet, RFSU and RFSL. Colour lithograph by Garbergs, ca. 1995.
  • A wine-grower squirts sulphur on his crop. Pen and ink drawing by G. Ri.
  • Ceres on a chariot with children representing the months March, April and May, surrounded by forms of natural abundance, corybantes and cherubs, symbolising the element earth. Etching by A. Tempesta, 1592.
  • A red orchid with a yellow stamen leans in towards a white orchid representing 'Love Question No 91', how do you make your feelings known, who turns you on?; one of a series of safe sex AIDS prevention advertisements by Folkhälsoinstitutet, RFSU and RFSL. Colour lithograph by Garbergs, ca. 1995.
  • A closed red tulip pointing towards an opening lily representing 'Love Question No 159', a warning that you can think what you like about infidelity, but you must think about the consequences of cheating without a condom?; one of a series of safe sex AIDS prevention advertisements by Folkhälsoinstitutet, RFSU and RFSL. Colour lithograph by Garbergs, ca. 1995.
  • A naked man walks through a rocky landscape with a scythe; representing summer. Etching by J. Coelemans, 1703, after L. Cardi da Cigoli.
  • A tree bearing fruit labelled with virtues; representing the life of the Christian. Coloured etching by J. Couse, c. 1780, after J. Bakewell.
  • A closed red tulip pointing towards a white rose in full bloom representing 'Love Question No 54', a message about the possible outcomes of love-making including STD's and HIV; one of a series of safe sex AIDS prevention advertisements by Folkhälsoinstitutet, RFSU and RFSL. Colour lithograph by Garbergs, ca. 1995.
  • The seed heads of flowers flying like arrows towards the inner stamen of a yellow flower representing 'Love Question No 324', a warning that no pill in the world protects against unwanted sexually transmitted diseases; one of a series of safe sex AIDS prevention advertisements by Folkhälsoinstitutet, RFSU and RFSL. Colour lithograph by Garbergs, ca. 1995.
  • Cybele, Bacchus, Ceres and Flora on a chariot drawn by lions surrounded by all forms of natural abundance and cherubs: symbolising the element earth. Etching by F. Bartolozzi, 1796, after F. Albani.
  • Cybele, Bacchus, Ceres and Flora on a chariot drawn by lions surrounded by all forms of natural abundance and cherubs, symbolising the element earth. Engraving by E. Baudet, 1695, after F. Albani.
  • The birth of King Louis XIII. Engraving by B. Audran the elder after J.M. Nattier after P.P. Rubens.
  • Retina development, composition
  • Transverse section of brain and eyes, Zebrafish model
  • Morula
  • Human blastocyst hatching
  • Mouse hand plate
  • Dorsal view of an early zebrafish embryo