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First trimester fetal cardiac activity. Sonographic documentation of a progressive early rise in heart rate.

Publication ,  Journal Article
Hertzberg, BS; Mahony, BS; Bowie, JD
Published in: J Ultrasound Med
October 1988

The heart rates of 124 first trimester fetuses were determined with real-time sonography and were analyzed with regard to gestational age. The mean embryonic heart rate increased from 101 beats per minute (bpm) at 5 to 5.95 menstrual weeks to 143 bpm at 8 to 8.95 weeks. After nine weeks, the rate reached a plateau, ranging from 137 to 144 bpm. Slower heart rates are normal early in the first trimester and should not be misinterpreted as an abnormal finding or mistaken for maternal pulsations.

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Published In

J Ultrasound Med

DOI

ISSN

0278-4297

Publication Date

October 1988

Volume

7

Issue

10

Start / End Page

573 / 575

Location

England

Related Subject Headings

  • Ultrasonography
  • Pregnancy Trimester, First
  • Pregnancy
  • Nuclear Medicine & Medical Imaging
  • Humans
  • Heart Rate, Fetal
  • Female
  • 3202 Clinical sciences
  • 1103 Clinical Sciences
 

Citation

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ICMJE
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Hertzberg, B. S., Mahony, B. S., & Bowie, J. D. (1988). First trimester fetal cardiac activity. Sonographic documentation of a progressive early rise in heart rate. J Ultrasound Med, 7(10), 573–575. https://doi.org/10.7863/jum.1988.7.10.573
Hertzberg, B. S., B. S. Mahony, and J. D. Bowie. “First trimester fetal cardiac activity. Sonographic documentation of a progressive early rise in heart rate.J Ultrasound Med 7, no. 10 (October 1988): 573–75. https://doi.org/10.7863/jum.1988.7.10.573.
Hertzberg BS, Mahony BS, Bowie JD. First trimester fetal cardiac activity. Sonographic documentation of a progressive early rise in heart rate. J Ultrasound Med. 1988 Oct;7(10):573–5.
Hertzberg, B. S., et al. “First trimester fetal cardiac activity. Sonographic documentation of a progressive early rise in heart rate.J Ultrasound Med, vol. 7, no. 10, Oct. 1988, pp. 573–75. Pubmed, doi:10.7863/jum.1988.7.10.573.
Hertzberg BS, Mahony BS, Bowie JD. First trimester fetal cardiac activity. Sonographic documentation of a progressive early rise in heart rate. J Ultrasound Med. 1988 Oct;7(10):573–575.

Published In

J Ultrasound Med

DOI

ISSN

0278-4297

Publication Date

October 1988

Volume

7

Issue

10

Start / End Page

573 / 575

Location

England

Related Subject Headings

  • Ultrasonography
  • Pregnancy Trimester, First
  • Pregnancy
  • Nuclear Medicine & Medical Imaging
  • Humans
  • Heart Rate, Fetal
  • Female
  • 3202 Clinical sciences
  • 1103 Clinical Sciences