Chapter 23: The First Trimester

Physiologic bowel herniation

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

Ampullary portion of the uterine tube

The most common location of an ectopic pregnancy is the:

Corpus luteum cyst

The most common pelvic mass associated with pregnancy is the:

Ampulla of the uterine tube

The most common site of fertilization is within the:

1 mm per day

The normal gestational sac will grow:

Hcg

What hormone maintains the corpus luteum during pregnancy?

Lungs

Which of the following is the most likely metastatic location of GTD?

Ovary

Which of the following locations for an ectopic pregnancy would be least likely?

Chorionic sac

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

Progesterone

What hormone, produced by the corpus luteum, maintains the thickened endometrium?

Methotrexate

What is often used to medically treat an ectopic pregnancy?

Complete molar pregnancy

What is the most common form of GTD?

Graafian

What is the name of the dominant follicle prior to ovulation?

Blastocyst

What is the stage of conceptus that implants within the decidualized endometrium?

vitelline duct

What structure connects the embryo to the yolk sac?

Yolk sac

What structure lies within the extraembryonic coelom?

Subchorionic hemorrhage

A sonographic exam 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 single live IUP. What is the most likely diagnosis?

Gestational sac

Another name for the chorionic sac is the:

Low hCG

Compared with a normal IUP, the ectopic pregnancy will have a:

Chorionic cavity

In the early gestation, where is the secondary yolk sac located?

Double every 48 hours

In the first trimester, normal hCG levels will:

11 and 14 weeks

NT measures are typically obtained between:

Choriocacinoma

A malignant form of GTD is:

Corpus luteum cyst

Sonographically, a normal appearing 7 week IUP is identified. Within the annexation, an ovarian cystic structure with a thick, hyperechoic rim is also discovered. What does this ovarian mass most likely represent?

Small for dates

All of the following are clinical findings consistent with a complete molar pregnancy except:

Low hCG

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

Advanced paternal age

All of the following are contributing factors for an ectopic pregnancy except:

Bilateral, multiloculated ovarian cysts

All of the following are sonographic findings consistent with ectopic pregnancy except:

Low beta hCG

All of the following may be sonographic findings in the presence of an ectopic pregnancy except:

Rhombencephalon

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

HCG

The trophoblastic cells produce:

Trisomy 16

All of the following are associated with an abnormal NT except:

Adnexal ring

All of the following are clinical features of an ectopic pregnancy except:

Choroid plexus

During a 12 week sonogram, bilateral echogenic structures are noted within the lateral ventricles of the fetal cranium,

24 hours

Fertilization typically occurs within _______ after ovulation.

Zygote

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

Decidual reaction

The first sonographically identifiable sign of pregnancy is the:

Yolk sac

The first structure noted within the gestational sac is the:

Ectopic pregancy

The most common cause of pelvic pain with pregnancy is:

Molar pregnancy

All of the following would be associated with a lower than normal hCG level except: