1,805 results found
Article
Umbilical cord coiling index
Umbilical cord coiling index is defined in terms of the number of 360-degree spiral course of umbilical vessels. This can be described in two main ways:
the number of coils per one centimeter of length of cord.
Normocoiled: one coil for a length of five centimeters.
Hypercoiled: more than one...
Article
Neural tube defects
Neural tube defect (NTD) refers to the incomplete closure of the neural tube in very early pregnancy, resulting in cranial defects or spinal dysraphism.
The neural tube comprises a bundle of nerve sheath which closes to form brain caudally and spinal cord rostrally. The closure should occur at ...
Case
Failed early pregnancy
Published
04 Jul 2022
94% complete
Ultrasound
Case
Torsion of dermoid cyst in a primigravid
Published
21 Nov 2021
80% complete
MRI
Case
Scalp hematoma types (diagram)
Published
30 Apr 2018
38% complete
Diagram
Case
Marginal cord insertion
Published
29 Sep 2023
97% complete
Ultrasound
Case
Variation in placental morphology: diagrams
Published
14 Apr 2011
32% complete
Diagram
Article
Fetal atrioventricular block
Fetal atrioventricular block is a form a fetal bradyarrhythmia often classified into
fetal partial atrioventricular block (PAVB)
fetal complete atrioventricular block (CAVB)
Epidemiology
Fetal atrioventricular block is considered rare finding with reported occurrences of around 1:11,000-20,0...
Article
Cystic renal dysplasia
Cystic renal dysplasia refers to a subgroup of congenital anomalies of the kidney and urinary tract characterized by the dysplastic renal parenchyma and formation of cysts. The most severe form is multicystic dysplastic kidney, in which functional renal parenchyma is absent and only undifferenti...
Article
The crisscross sign
The crisscross sign is a fetal ultrasound sign that describes the normal relationship between the ventricular outflows tracts of the fetal heart. The left ventricular outflow tract (LVOT); represented by the take-off of the aorta (Ao) from the left ventricle, is perpendicular (90o) to the right ...
Case
Pregnancy of uncertain viability (PUV)
Published
17 Apr 2011
82% complete
Ultrasound
Article
Echogenic fetal bowel
Echogenic fetal bowel is an observation in antenatal ultrasound imaging, in which fetal bowel appears to be brighter than it is supposed to be. It is a soft marker for trisomy 21 and has several other associations. When observed, it needs to be interpreted in the context of other associated abno...
Article
Hemimegalencephaly
Hemimegalencephaly is a rare congenital disorder of cortical formation with hamartomatous overgrowth of all or part of a cerebral hemisphere. This results from either increased proliferation or decreased apoptosis (or both) of developing neurons 2.
Epidemiology
Hemimegalencephaly is a cryptoge...
Article
Early pregnancy
Early pregnancy roughly spans the first ten weeks of the first trimester.
Radiographic features
Antenatal ultrasound
0-4.3 weeks: no ultrasound findings
4.3-5.0 weeks:
possible small gestational sac
possible double decidual sac sign (DDSS)
possible intradecidual sac s...
Case
Endocardial fibroelastosis
Published
11 Nov 2018
69% complete
Ultrasound
Case
Vanishing twin phenomenon
Published
19 Jul 2012
54% complete
Case
Choriocarcinoma
Published
03 Nov 2014
95% complete
CT
Article
Missed miscarriage
A missed miscarriage, sometimes termed a missed abortion 3, is a situation when there is a non-viable fetus within the uterus, without symptoms of a miscarriage.
Radiographic features
Ultrasound
Ultrasound diagnosis of miscarriage should only be considered when either a mean gestation sac d...
Article
Postpartum hemorrhage risk factors (mnemonic)
A mnemonic to remember the basic risk factors of postpartum hemorrhage is:
PARTUM
Mnemonic
P: prolonged labor / polyhydramnios / previous C-section
A: APH
R: recent Hx of bleeding
T: twins
U: uterine fibrosis
M: multiparity
Case
Anatomy of fetal eye
Published
11 May 2014
29% complete
Annotated image
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