Ultrasound Pregnancy by Trimester
FIRST QUARTER
First Ultrasound Pregnant women are usually carried out :
Between 11 and 14 weeks gestation
It is usually done by:
Elección.Eco vaginally 1
You see the number of fetuses (if multiple pregnancy ) and gestational age . If the pregnancy is multiple , it is determined whether mono or mono-or dichorionic and diamniotic .
Id embryonic heartbeat.
Measurement of nuchal translucency and CRL (must be less than 3 mm )
It is useful for the screening of chromosomal I quarter.
Embryo morphology was observed .
We currently also serves ultrasound screening for fetal malformations, placental pathology of the amniotic fluid , uterine and ovarian
SECOND QUARTER
The NEXT Pregnancy ultrasound is usually performed :
Between 18 and 22 weeks gestation
It is usually performed by abdominal Road .
Measures of fetus and placenta are made .
Was the fetal morphological study (prenatal diagnosis) , and diagnosis of structural anomalies and markers crosomopatías .
Sonographic markers associated with aneuploidy older :
Nervous System study to rule out hydrocephalus, holoprosencephaly , microcephaly, ventriculomegaly , spina bifida, agenesis of the corpus callosum , Dandy -Walker syndrome or other malformations ago.
Face and neck (facial cleft, micrognathia , macroglossia , cystic hygroma ) .
Chest ( diaphragmatic hernia , cardiac malformations , hydrothorax and ascites ) .
Abdomen ( omphalocele , gastroschisis , esophageal -duodenal atresia ) .
Urogenital ( multicystic kidney, horseshoe , ureteral pathology, bladder ) .
Schedules ovular ( single umbilical artery, umbilical cord cyst , hydramnios ) .
Minor ultrasound markers associated with aneuploidy :
Nuchal edema, echogenic bowel , shortened long bones , renal pyelectasia , choroid plexus cyst , nasal bone, ...
THIRD QUARTER
Another Pregnancy ultrasound is performed:
Between 32 and 36 weeks gestation
Is preferably made by abdominal Road .
Identifies fetal vitality and static .
Determination of fetal measurements were made .
Estimated fetal weight ( percentiles) .
Rate pathology and fetal growth , amniotic fluid and placental location and maturation.
Hemodynamic study ( Doppler ) for the evaluation of growth retardation and high risk pregnancies or suspected pathology.
Utero - placental study area ( uterine artery).
Study of fetal- placental territory (umbilical artery).
Study of fetal arterial circulation ( middle cerebral , descending aorta , renal )
Ultrasound Pregnancy