Intrinsic |
Chromosomal |
Trisomy 18, 13, 21 |
Deletions of chromosomes 18q, 4p, 7q, 9q, 13q, 22q11.2 |
Sex chromosome aneuploidy |
Connective tissue |
Arthrogryposis |
Collagen defects |
Joint synostosis |
Neuromuscular conditions |
Anencephaly |
Anterior motor horn cell deficiency |
Hydranencephaly |
Holoprosencephaly |
Myelomeningocele |
Spina bifida |
Myotonic dystrophy |
Spinal muscular atrophy |
Muscular |
Myopathy |
Myotonic dystrophy |
Skeletal dysplasia |
Campomelic dysplasia |
Chondrodysplasia punctata |
Diastrophic dysplasia |
Ellis-van Creveld |
Syndromes |
Escobar |
Hecht |
Larsen |
Meckel-Gruber |
Multiple pterygium |
Pena Shokeir |
Smith-Lemli-Opitz |
Zellwegers |
Gordon |
Pierre-Robin |
Roberts |
TARP (talipes equinovarus, atrial septal defect, Robin sequence, persistence of left superior vena cava) |
Lambert |
Extrinsic |
Amniotic bands or synechiae |
Early amniocentesis (before 15 weeks of gestation) |
Intrauterine crowding |
Fibroids |
Multiple gestation |
Oligohydramnios |
Potter sequence |
Malposition |
Breech |
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