Diagnostic Criteria for Nonviable Pregnancy Early in the First Trimester | New England Journal of
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Background No meta-analysis has analyzed the effect of physical activity level, period of
physical activity intervention, and duration of intervention, on perinatal depression. This …

Since being introduced more than 30 years ago, endovaginal ultrasonography (US) and
quantitative testing of serum levels of the beta subunit of human chorionic gonadotropin …

Objectives The human chorionic gonadotropin (hCG) discriminatory level—the maternal
serum β‐hCG level above which a gestational sac should be consistently visible on …

Objective: To evaluate the potential of the first-trimester ultrasound (US) features for the
detection of central nervous system (CNS) anomalies. Methods/Methodology: This is a …

Objective To determine the value of yolk sac size and shape for prediction of pregnancy
outcome in the first trimester. Material and methods 500 pregnant women between 6+ 0 and …

Objectives We hypothesized that pregnant women would have an increased risk of
spontaneous cervical artery dissection (sCeAD) affecting the carotid or vertebral arteries …

This pictorial essay aims to inform related clinicians by summarizing the normal and
abnormal sonographic findings of the yolk sac in the first trimester of pregnancy. An …

Objectives The yolk sac is the first conceptional structure that becomes sonographically
visible within the gestational sac. Because the yolk sac is the primary route of exchange …

BACKGROUND Ectopic pregnancy (EP) is one of the most common acute abdominal
diseases in gynecology. Once the condition of EP is delayed, it may lead to massive …