Search on: GESTATIONAL SAC 
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Descriptor English:   Gestational Sac 
Descriptor Spanish:   Saco Gestacional 
Descriptor Portuguese:   Saco Gestacional 
Tree Number:   A16.535
Definition English:   Round-shaped structure usually located in the upper fundus of the UTERUS in early pregnancy. It comprises EMBRYO; AMNIOTIC FLUID; and YOLK SAC. It is visible in PRENATAL ULTRASONOGRAPHY by the fifth week of pregnancy. Its size is often used to determine and monitor GESTATIONAL AGE; FETAL GROWTH; and PREGNANCY COMPLICATIONS. 
History Note English:   2011 
Allowable Qualifiers English:  
AB abnormalities AH anatomy & histology
BS blood supply CH chemistry
CY cytology DE drug effects
EM embryology EN enzymology
GD growth & development IM immunology
IN injuries IR innervation
ME metabolism MI microbiology
PS parasitology PA pathology
PH physiology PP physiopathology
RE radiation effects RA radiography
RI radionuclide imaging SE secretion
SU surgery TR transplantation
US ultrasonography UL ultrastructure
VI virology  
Record Number:   53864 
Unique Identifier:   D058746 

Occurrence in VHL: 		 

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