Braxton Hicks contractions
Braxton Hicks contractions are physiological contractions of myometrium that occur in pregnancy. They are often sporadic and start by ~6 weeks.
It may be seen as a transient change myometrial thickness 2.
History and etymology
Named after John Braxton Hicks: English physician who first described it in 1871 1,5.
Considerations for a focal myometrial thickness include:
- uterine leiomyoma: not transient
- 1. Dunn PM. John Braxton Hicks (1823-97) and painless uterine contractions. Arch. Dis. Child. Fetal Neonatal Ed. 1999;81 (2): F157-8. Arch. Dis. Child. Fetal Neonatal Ed. (link) - Free text at pubmed - Pubmed citation
- 2. Yiu-chiu V, Chiu L. Sonographic features of placental complications in pregnancy. AJR Am J Roentgenol. 1982;138 (5): 879-85. AJR Am J Roentgenol (citation) - Pubmed citation
- 3.Masui T, Katayama M, Kobayashi S et-al. Pseudolesions related to uterine contraction: characterization with multiphase-multisection T2-weighted MR imaging. Radiology. 2003;227 (2): 345-52. doi:10.1148/radiol.2271011587 - Pubmed citation
- 4. Wilson RL, Worthen NJ. Ultrasonic demonstration of myometrial contractions in intrauterine pregnancy. AJR Am J Roentgenol. 1979;132 (2): 243-7. AJR Am J Roentgenol (abstract) - Pubmed citation
- 5. Hicks JB : On the contractions of the uterus throughout pregnancy, their physiological effects and their value in the diagnosis of pregnancy. Trans Obstet Soc London 13 : 216- 231, 1871