First Trimester bleeding
What is the most common cause of bleeding during the first trimester?
Subchorionic Hemorrhage
What condition is defined by a gestational sac without an embryo or yolk sac?
Blighted ovum
Where do 95% of ectopic pregnancies occur?
Fallopian tube
What condition is characterized by failure of the forebrain to divide into two cerebral hemispheres?
Holoprosencephaly
What is the most common ovarian mass seen in the first trimester?
Corpus luteum cyst
The embryonic placenta, may become detached, resulting in formation of.....
Hematoma
What is a key sonographic finding of an incomplete abortion?
Thickened endometrium >5 mm
What beta-hCG level range suggests an intrauterine pregnancy when detected via transvaginal ultrasound?
800-1000 IU/L based on 2IS
1000-2000 IU/L based on first IRP
What is the hallmark of anencephaly in the first trimester?
Absence of the brain and cranial vault
What is a characteristic finding of a hemorrhagic corpus luteum cyst?
Ring of increased vascularity on color Doppler
What feature differentiates placental hematomas from subchorionic hemorrhages? (hint, it involves bleeding)
Placental hematomas do not cause symptoms or bleeding
The gestational sac should be imaged by both TV and TA when its mean diameter is
5mm
What is the most life-threatening type of ectopic pregnancy?
interstitial
What cystic structure within the posterior embryonic cranium should not be mistaken for an abnormality?
Rhombencephalon
A 24-year-old woman presents with vaginal bleeding and a positive pregnancy test. Sonography shows an empty uterus with no adnexal masses. What is the likely diagnosis?
Complete abortion
What sonographic sign indicates a poor prognosis when bleeding is accompanied by severe pain and uterine contractions?
dilated cervix
variations in embryonic cardiac rate during the first trimester ranges from?
90-170bpm
What is the most critical sonographic finding when evaluating for ectopic pregnancy?
Absence of intrauterine pregnancy with presence of adnexal mass
What is the characteristic appearance of gestational trophoblastic disease on ultrasound?
Snowstorm pattern
What should be suspected when an intrauterine sac-like structure is seen but lacks a living embryo or yolk sac?
Pseudogestational sac in ectopic pregnancy
What is the fetal loss rate associated with placental hematomas?
50% or greater
What associated pathology is seen in 50% of patients with Gestational trophoblastic disease?
Bilateral theca lutein cysts
What sonographic finding suggests an ectopic pregnancy when no embryo or yolk sac is present?
Pseudogestational sac
What is the normal size limit of the yolk sac between 5 and 10 weeks' gestation
5.5 mm
A 32-year-old patient presents with lower abdominal pain and spotting. Ultrasound reveals a gestational sac within the left adnexal area. What condition should be suspected?
Ectopic pregnancy