Human Prenatal Development Research Articles

The development of the olfactory and the accessory olfactory formations in human embryos and fetuses

Journal of Comparative NeurologyVolume 73, Issue 3 p. 431-468 Article The development of the olfactory and the accessory olfactory formations in human embryos and fetuses Tryphena Humphrey, Tryphena Humphrey Department of Anatomy, University of Pittsburgh, Pennsylvania Search for more papers by this author Tryphena Humphrey, Tryphena Humphrey Department of Anatomy, University of Pittsburgh, Pennsylvania Search for more papers by this author First published: December 1940 https://doi.org/10.1002/cne.900730305Citations: 117 Aided by grants from the Penrose Fund of the American Philosophical Society, the Carnegie Corporation of New York and the University of Pittsburgh. Publication no. 7, Physiological and morphological studies on human prenatal development. AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Citing Literature Volume73, Issue3December 1940Pages 431-468 RelatedInformation

PRENATAL CONDITIONS AND THE STATUS OF INFANTS AT BIRTH

This study was undertaken with the hope of clarifying the relationship between certain maternal conditions during pregnancy and the state of well-being of the fetus at birth, as measured by length, weight, development of bone and blood calcium. Present researches in the field of human prenatal development continue to show how difficult it is to demonstrate cause and effect in growth, since it is virtually impossible to secure subjects who live under sufficiently similar conditions to have truly common factors as a basis for comparison. Although this study is based on a group of subjects who had few significant factors in common, the facts are presented because the group was large and the conditions under which the observations were made were unusually uniform and favorable for a fairly accurate analysis and sorting of data. METHOD OF INVESTIGATION This study was made in Dayton, Ohio, on a group of about two