Symptom >> Obstetrics and Gynecology >> Obstetrics

Uterine height below gestational weeks

Introduction
Cause
Examine
Diagnosis

Introduction

Introduction In the middle and late pregnancy, the uterus is enlarged. According to the height of the hand and the length of the uterus, the number of weeks of pregnancy can be judged. The uterus height is lower than the number of weeks of pregnancy and is common in dystocia.

Cause

Cause

1. Excessive relaxation of the abdominal wall of the mother and excessive amniotic fluid.

2, the full-term fetus, has not turned to the first exposure.

3, uterine malformation or tumor, pelvic stenosis, placenta, etc. hinder the longitudinal axis of the carcass parallel to the mother and the fetal head.

4, the fetal head is round and can not be fixed, the basin is blocked, the uterus is not oval, such as pelvic stenosis, pelvic tumor, polyhydramnios, abdominal wall relaxation, multiple pregnancy, uterine malformation, double uterus, premature delivery, placenta previa or lower uterus Wall placenta and other causes.

Examine

an examination

Related inspection

Gynecological ultrasound examination of the number of weeks of pregnancy

1, symptoms: easily lead to uterine weakness and premature rupture of membranes. After the rupture of the membrane, the amniotic fluid rapidly drains, and the fetal upper limbs and umbilical cord are easily released, resulting in fetal distress and even death. As the labor progresses, part of the shoulder and thorax is squeezed into the pelvic cavity, the carcass folds and bends, the fetal head folds to the ventral side of the carcass, is incarcerated on one side of the armpit, and the fetal buttocks are incarcerated in the contralateral armpit or folded in In the upper part of the uterine cavity, the neck is elongated, and the upper limbs are released into the vagina, forming a neglected (incarcerated) shoulder. At this time, the contractions continue to strengthen, and it is easy to cause the uterus to rupture. If not treated in time, uterine rupture will occur.

2, signs:

(1) Abdominal examination: The uterus is horizontally elliptical, the height of the uterus is lower than the number of weeks of pregnancy, and the emptiness above the fundus and pubic symphysis touches the fetal head on one side of the abdomen, and the other side touches the fetal hip.

(2) Anal examination: When the fetal membrane is not broken and the cervix is not open, the anal examination is not easy to touch the exposed part of the fetus.

(3) vaginal examination: when the membrane is broken and the cervix is opened, the vaginal examination can reach the fetal hand, the fetal arm or the scapula, the ribs and the armpit, and the tip of the axilla is facing the head of the fetus, according to which the fetal head can be judged to the left of the mother. Side or right side.

Diagnosis

Differential diagnosis

B-mode ultrasound imaging, in the enlarged uterine contour, see a circular aura from the amniotic sac, a dark dark area (amniotic fluid) in the pregnancy ring. The pregnancy ring was first seen at 5 weeks of gestation. If a rhythmic fetal heartbeat and fetal movement are seen in the pregnancy ring, it can be diagnosed as an early pregnancy. B-mode ultrasound imaging can not only display the number of fetuses, fetal type, fetal exposure, fetal position, fetal heart rate and placenta position, but also can measure multiple diameters such as fetal head double diameter. No fetal malformations. Ultrasound Doppler method can detect fetal heart sound, fetal movement, umbilical blood flow and placental blood flow, etc., which can be used for the diagnosis of middle and late pregnancy.