What type of ventricular septal defect is located near the base of the heart (near the AV valves)?

In a twin gestation, division of the zygote prior to day 4 post fertilization will result in which of the following conditions?

What is the most common pediatric ovarian mass?

Patient history:  pelvic pain, vaginal spotting, and hCG level of 4987.  Ultrasound findings include thickened endometrium, free fluid in the posterior cul-de-sac, simple cyst noted on the right ovary, paraovarian mass with increased color flow.  What is the most likely diagnosis for this patient?

What is postaxial polydactyly?

What is the name of a midline defect of the abdominal wall in which loops of bowel herniate into the umbilicus?

What is the term used to describe undescended testicles?

Which of the following is most likely to result in a cesarean section?

What is the most likely diagnosi for the finding in this m-mode with the rate measured by the blue arrows at 410 bpm and the red arrows 120 bpm?

From an apical view of the fetal heart, which way should the sonographer angle the transducer to obtain a view of the aortic outflow tract?