lower uterine segment

low·er u·ter·ine seg·'ment

the inferior portion or isthmus of the uterus, the lower extremity of which joins with the cervical canal and, during pregnancy, expands to become the lower part of the uterine cavity. This is not the active contracting portion of the uterus.
References in periodicals archive ?
Variables influencing the integrity of lower uterine segment in post-cesarean pregnancy.
Placenta previa is the partial or complete attachment of placenta in lower uterine segment.
Sagittal and axial T1- and T2-weighted images demonstrated a gestational sac bulging through the myometrium of the lower uterine segment in the region of Cesarean section scar (Figure 4).
The afferent pain fibres of the cervix and lower uterine segment are carried along with the utero-vaginal plexus to the inferior hypogastric plexus.
Place a tourniquet around the lower uterine segment, including the infundibular pelvic ligaments.
An urgent MRI was performed and showed a normal sized uterus with an irregular complex mass of 25 x 30 x 30 mm at the lower uterine segment anteriorly at the previous cesarean scar site.
A repeated USG scan revealed a stable intramural hypoechogenic gestational sac in the lower uterine segment.
sup][1] APA generally occurs in premenopausal women, and it involves the endometrium of the lower uterine segment.
TVS confirmed the TAS findings and in addition revealed an empty uterine cavity and cervical canal with echogenic collection around the cervix and the lower uterine segment.
ACOG's 2012 Practice Bulletin on Prediction and Prevention of Preterm Birth, which does not mandate universal screening but supports its consideration, notes that, "if second trimester transabdominal scanning of the lower uterine segment suggests that the cervix may be short or have some other abnormality, it is recommended that a subsequent transvaginal ultrasound examination be performed to better visualize the cervix and establish its length" (Obstet Gynecol.
Sonographic lower uterine segment thickness and risk of uterine scar defect: a systematic review.
2 Placement of forceps in the lower uterine segment.

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