Fetal loss rate after ultrasonically documented cardiac activity between 6 and 14 weeks, menstrual age

J Clin Ultrasound. 1991 May;19(4):221-3. doi: 10.1002/jcu.1870190406.


The pregnancy outcome of 347 patients with a confirmed, viable intrauterine pregnancy between 6.0 and 14.0 weeks, menstrual age, was determined. The miscarriage rate was 4.2% in a subgroup of patients without vaginal bleeding, as compared with 12.7% in a subgroup with bleeding (chi 2 = 7.4, p less than 0.006). First trimester vaginal bleeding was a significant covariate in the determination of the spontaneous miscarriage rate after fetal cardiac activity has been confirmed.

MeSH terms

  • Abortion, Spontaneous*
  • Adolescent
  • Adult
  • Female
  • Fetal Heart / physiology*
  • Gestational Age
  • Humans
  • Infant, Newborn
  • Pregnancy
  • Pregnancy Complications, Cardiovascular
  • Prospective Studies
  • Ultrasonography, Prenatal*
  • Uterine Hemorrhage / complications