Chadwick's sign
Chadwick's sign is a bluish discoloration of the cervix, vagina, and labia caused by the hormone estrogen which results in venous congestion. It can be observed as early as 6-8 weeks after conception, and its presence is an early sign of pregnancy.
These color changes were discovered in approximately 1836 by French doctor Étienne Joseph Jacquemin (1796-1872),[1] and are named after James Read Chadwick, who drew attention to it in a paper read before the American Gynecological Society in 1886 and published in the following year, wherein he credited Jacquemin for their discovery.[1][2]
Note: In some it can be seen earlier. http://www.pregnancytoday.com/glossary/232-Chadwick%27s+Sign/
See also
References
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fr:Signe de Chadwick nl:Teken van Chadwick pl:Objaw Chadwicka
pt:Sinal de Chadwick- ↑ 1.0 1.1 Gleichert, James E. (1971). "Étienne Joseph Jacquemin, Discoverer of 'Chadwick's Sign'". Journal of the History of Medicine and Allied Sciences. 26 (1): 75–80. doi:10.1093/jhmas/XXVI.1.75. PMID 4925842.
- ↑ Chadwick, James Reed (1887). "The value of the bluish discoloration of the vaginal entrance as a sign of pregnancy". Transactions of the American Gynecological Society (11): 399–418.
