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Anencephaly is the absence of a major portion of the brain, skull, and scalp that occurs during embryonic development. It is a cephalic disorder that results from a neural tube defect that occurs when the rostral (head) end of the neural tube fails to close, usually between the 23rd and 26th day following conception.
Neural tube defects ( NTDs) are a group of birth defects in which an opening in the spine or cranium remains from early in human development. In the third week of pregnancy called gastrulation, specialized cells on the dorsal side of the embryo begin to change shape and form the neural tube. When the neural tube does not close completely, an ...
Encephalocele is a neural tube defect characterized by sac-like protrusions of the brain and the membranes that cover it through openings in the skull. These defects are caused by failure of the neural tube to close completely during fetal development. Encephaloceles cause a groove down the middle of the skull, or between the forehead and nose ...
Signs and symptoms. The first sign of umbilical cord prolapse is usually a sudden and severe decrease in fetal heart rate that does not immediately resolve. On fetal heart tracing (a linear recording of the fetal heart rate) this would usually look like moderate to severe variable decelerations.
Polyhydramnios is a medical condition describing an excess of amniotic fluid in the amniotic sac.It is seen in about 1% of pregnancies. It is typically diagnosed when the amniotic fluid index (AFI) is greater than 24 cm. There are two clinical varieties of polyhydramnios: chronic polyhydramnios where excess amniotic fluid accumulates gradually, and acute polyhydramnios where excess amniotic ...
By definition, septic abortion is caused by a variety of bacterial infections. Bacteria can come from vaginal and endocervical flora or can be transmitted sexually. [4] The development of sepsis is primarily due to two scenarios. When there is an incomplete abortion caused by the pathogens that result in products of conception remaining in the ...
Specialty. Medical genetics. Acrania is a rare congenital disorder that occurs in the human fetus in which the flat bones in the cranial vault are either completely or partially absent. [1] The cerebral hemispheres develop completely but abnormally. [1] The condition is frequently, though not always, associated with anencephaly.
Samantha Casiano, a 29-year-old living in eastern Texas, found out halfway through her pregnancy last year that her daughter, Halo, had a rare diagnosis of anencephaly, where much of the skull and ...