Fetus Anatomy

The second trimester extends from 13 weeks and 0 days to 27 weeks and 6 days of gestation although the majority of these studies are performed between 18 and 23 weeks. About half of this enters the fetal ductus venosus and is carried to the inferior vena cava while the other half enters the liver proper from the inferior border of the liver.

Anatomy Fetus In Utero

A thin walled sac that surrounds the fetus during pregnancy.

Fetus anatomy. The fetus obtains oxygen and nutrients from the mother through the placenta and the umbilical cord. As the embryo develops into a fetus the tube shaped heart folds and further differentiates into the four chambers present in a mature heart. Brain ventricles choroid plexus mid brain posterior fossa cerebellum cisterna magna.

Neck nuchal fold thickness. An organ shaped like a flat cake. The fetal circulatory system becomes much more specialized and efficient than its embryonic counterpart.

Those who want to can find out the sex of the baby if desired. The lower part of the uterus that extends into the vagina. The following fetal parts are checked during the anatomy ultrasound.

The anatomy scan is a level 2 ultrasound which is typically performed on pregnant women between 18 and 22 weeks. In some cases fetal ultrasound is used to evaluate possible problems or help confirm a diagnosis. Images are much clearer and more detailed than the fuzzy ultrasound you got in your first trimester.

When a longitudinal plane of section demonstrates the fetal body to be transected transversely and the fetal spine is nearest the uterine fundus with the fetal right side down the fetus is in a transverse lie with the fetal head on the maternal right. The second trimester scan is a routine ultrasound examination in many countries that is primarily used to assess fetal anatomy and detect the presence of any fetal anomalies. Fetus in utero amniotic sac.

An unborn baby from the 8th week after fertilization until birth. Heart rate rhythm 4 chamber views. The fetal circulatory system.

It only grows. Fetal ultrasound images can help your health care provider evaluate your babys growth and development and monitor your pregnancy. The fetal period lasts from the ninth week of development until birth.

Blood from the placenta is carried to the fetus by the umbilical vein. Your baby will be measured from crown to rump around the middle and around the head and his or her weight will be estimated. During this period male and female gonads differentiate.

When the heart first forms in the embryo it exists as two parallel tubes derived from mesoderm and lined with endothelium which then fuse together. A level 2 ultrasound focuses closely on fetal anatomy to be sure everything is growing and developing as it should. A fetal ultrasound sonogram is an imaging technique that uses sound waves to produce images of a fetus in the uterus.

Skull shape integrity bpd and hc measurements.

28 3 Fetal Development Anatomy And Physiology