Abstract
The objective of this study is to describe magnetic resonance (MR) signal intensity (SI) changes in the cervix during pregnancy. This is an observational cohort study of women with a history of preterm delivery. MR imaging sequences were performed every 3 to 4 weeks. Using 8 regions of interest, the SIs are quantified and analyzed with respect to gestational age. Twenty-seven MR studies were performed on a cohort of 8 women. The SIs of the external os are significantly greater than those of the internal os ( P =.035). Similarly, the SIs of the outer stroma are greater than those of the inner stroma (P =.002). As gestational age advances, the inner to outer stromal SI ratio increases, primarily because of a decreasing SI in the outer stromal layer (P = .03). The MR SIs of the cervical stromal zones display variability during pregnancy and decrease with advancing gestation.
Original language | English (US) |
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Pages (from-to) | 440-444 |
Number of pages | 5 |
Journal | Reproductive Sciences |
Volume | 14 |
Issue number | 5 |
DOIs | |
State | Published - Jul 2007 |
Keywords
- Cervix
- Magnetic resonance
- Pregnancy
ASJC Scopus subject areas
- Obstetrics and Gynecology