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Twinning

The document discusses twinning and age determination in prenatal diagnosis, outlining types of multiple births such as dizygotic and monozygotic twins. It highlights potential problems associated with twinning, age determination methods during different trimesters, and various congenital anomalies that can arise. Additionally, it covers causes of anomalies and methods for prenatal diagnosis including ultrasound and amniocentesis.

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yadavaasthaa
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30 views13 pages

Twinning

The document discusses twinning and age determination in prenatal diagnosis, outlining types of multiple births such as dizygotic and monozygotic twins. It highlights potential problems associated with twinning, age determination methods during different trimesters, and various congenital anomalies that can arise. Additionally, it covers causes of anomalies and methods for prenatal diagnosis including ultrasound and amniocentesis.

Uploaded by

yadavaasthaa
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as KEY, PDF, TXT or read online on Scribd
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TwinningAge determination&

Prenatal Diagnosis
Twinning
Multiple births
Twin
Triplet
Quad
etc
Types
Dizygotic
F~
Monozygotic
I~
Types
Dizygotic
Bichorial, Biamniotic
Monozygotic
Bichorial, Biamniotic -?
Monochorial, Biamniotic - ?
Monochorial, Monoamniotic -?
Problems
Partial separation
Craniopagus
Thoracopagus
~pagus
Age Determination
1st Trimester
CRL-?
2nd Trimester
BPD - ?
Head circumference
3rd Trimester
FL - ?
FL - ?
Teratology
1st Trimester Defects
Exposure ?- severity
Timing
Dosage
Specificity
Mechanism
Structural
Cleft lip
ASD
PDA
Congenital Anomalies
2nd & 3rd Trimester
Structural
Thalidomide
Functional
Metabolic syndromes
Congenital Anomalies
2nd & 3rd Trimester
Deformation
Clubfoot
Disruption
Amniotic Band syndromes
Dysplasia
Achondroplasia
Causes
Genetic
Drugs
Infection
Maternal
Substance abuse
Prenatal Diagnosis
For ?
Genetic
Chromosomal
Structural
Prenatal Diagnosis
USS
Amniocentesis
Chorionic Villus
MRI
Foetoscopy
Cordocentesis
α – fetoprotien assay
Maternal screening
?

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