Obgyn Key

Face 8.1 Cleft Lip and Palate Description and Clinical Features Cleft lip is a congenital defect in the upper lip that is usually laterally located and often extends into the…

Neck 9.1 Thickened Nuchal Fold (16–20 Weeks Gestation) Description and Clinical Features Neonates with trisomy 21 (Down syndrome) often have thickening of the soft tissues in the posterior neck. This…

Spine 7.1 Spina Bifida and Meningomyelocele Description and Clinical Features Spina bifida results from abnormal development of the neural tube, with failure of the posterior vertebral arches to close and…

First Trimester Pregnancy Complication 5.1 Early Pregnancy Failure Description and Clinical Features The rate of pregnancy loss is highest in the first trimester, especially before 8 weeks gestation. A number…

Fetal Anomalies at 11–14 Weeks 4.1 Thickened Nuchal Translucency Description and Clinical Features The thickness of the tissue posterior to the cervical spine at 10–14 weeks, called the nuchal translucency,…

Second and Third Trimester Fetal Anatomy 2.1 Head Description and Clinical Features By the beginning of the second trimester, the fetal cranium and brain are well formed, although the skull…

First Trimester 1.1 Normal Pregnancy Prior to 6 Weeks of Gestation Description and Clinical Features Fertilization occurs at approximately 14 days after the beginning of the last menstrual period (LMP)….

Second and Third Trimester Nonfetal Components 3.1 Umbilical Cord Description and Clinical Features The umbilical cord contains the blood vessels that carry blood between the fetus and the placenta. It…