OB 1st trimester

Subchorionic hemorrhage is a common consequence of:

implantation of the conceptus

When measuring the mean sac diameter, the calipers should be placed from the:

inner wall to inner wall

Which of the following ectopic locations is most life threatening to the patient?

interstitial

Which of the following is an abnormal finding in a first-trimester pregnancy?

prominent cystic structure in the posterior brain ----visualization of the amnion without an embryo fetal heart rate of 100 beats per minute herniation of the fetal bowel into the umbilical cord

The structure created by the union of sperm and egg is the:

zygote

What structure connects the embryo to the yolk sac?

Vitelline duct

The first structure noted within the gestational sac is the:

Yolk sac

Which of the following structures implants into the endometrium?

blastocyst

Which of the following is the most accurate method of measuring gestational age?

crown-rump length

The decidua capsularis and decidua parietalis produce the:

double decidua sign

Nuchal Translucency (NT) measures are typically obtained between:

11 and 14 weeks

The optimal gestation age for measuring fetal nuchal translucency is from:

11 weeks and 0 days to 13 weeks and 6 days

On transvaginal imaging, in a normal pregnancy, cardiac activity must be identified when the CRL is greater than:

4 mm

The most common site of fertilization is within the:

Ampulla of the uterine tube

The most common location of an ectopic pregnancy is the:

Ampullary portion of the uterine tube

A malignant form of Gestational Trophoblastic Disease (GTD) is:

Choriocarcinoma

With a normal pregnancy, the first structure noted within the decidualized endometrium is the:

Chorionic sac

What is the most common form of Gestational Trophoblastic Disease (GTD)?

Complete molar pregnancy

Click all of the abnormalities that are associated with an abnormal Nuchal Translucency.

Dandy-Walker malformation ----Trisomy 13 Trisomy 16 ----Trisomy 21 ----Trisomy 18

All of the following are consistent with a complete hydatidiform mole except:

Hyperemesis gravidarum ----Low hCG Bilateral theca lutein cysts Heterogeneous mass within the endometrium

The migration of the embryologic bowel into the base of the umbilical cord at 9 weeks is referred to as:

Physiologic bowel herniation

During a first-trimester sonogram, you note a round, cystic structure within the fetal head. This most likely represents the:

Rhombencephalon

A sonographic examination was performed on a pregnancy patient who complained of vaginal bleeding. Sonographically, a crescent-shaped anechoic area is noted adjacent to the gestational sac. The gestational sac contained a 6-week single live IUP. What is the most likely diagnosis?

Subchorionic hemorrhage

What is the first definitive sonographic sign of an IUP?

The identification of the gestational sac within the decidualized endometrium