Chadwick sign is a bluish discoloration of the
cervix
The cervix or cervix uteri (Latin, 'neck of the uterus') is the lower part of the uterus (womb) in the human female reproductive system. The cervix is usually 2 to 3 cm long (~1 inch) and roughly cylindrical in shape, which changes during ...
,
vagina
In mammals, the vagina is the elastic, muscular part of the female genital tract. In humans, it extends from the vestibule to the cervix. The outer vaginal opening is normally partly covered by a thin layer of mucosal tissue called the hy ...
, and
labia
The labia are part of the female genitalia; they are the major externally visible portions of the vulva. In humans, there are two pairs of labia: the '' labia majora'' (or the outer labia) are larger and thicker, while the ''labia minora'' are f ...
resulting from increased
blood flow
Hemodynamics or haemodynamics are the dynamics of blood flow. The circulatory system is controlled by homeostatic mechanisms of autoregulation, just as hydraulic circuits are controlled by control systems. The hemodynamic response continuousl ...
. It can be observed as early as 6 to 8 weeks after
conception, and its presence is an early sign of
pregnancy
Pregnancy is the time during which one or more offspring develops ( gestates) inside a woman's uterus (womb). A multiple pregnancy involves more than one offspring, such as with twins.
Pregnancy usually occurs by sexual intercourse, but ...
.
These colour changes were discovered in approximately 1836 by
French doctor
Doctor or The Doctor may refer to:
Personal titles
* Doctor (title), the holder of an accredited academic degree
* A medical practitioner, including:
** Physician
** Surgeon
** Dentist
** Veterinary physician
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*Other roles
** ...
Étienne Joseph Jacquemin (1796-1872),
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.
See also
*
Linea nigra
*
Goodell's sign
*
Hegar sign
*
Ladin's sign
References
Obstetrics
Medical signs
Midwifery
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