TY - GEN AU - O'Brien,J M AU - Houseman,B A AU - Allen,A A AU - Barton,J R TI - Methylcellulose gel is a superior contrast agent for ultrasound examination of the cervix in obstetric patients SN - 0960-7692 PY - 2003///0516 KW - Adult KW - Cervix Uteri KW - diagnostic imaging KW - Contrast Media KW - standards KW - Female KW - Humans KW - Methylcellulose KW - Obstetric Labor, Premature KW - Pregnancy KW - Pregnancy Trimester, Second KW - Pregnancy, High-Risk KW - Pregnancy, Multiple KW - Ultrasonography, Prenatal KW - methods KW - Uterine Cervical Incompetence N1 - Publication Type: Journal Article UR - https://doi.org/10.1002/uog.42 ER -