Variation of embryonic/fetal heart rate at 6-13 weeks' gestation

• Type: Article in International Scientific Journal
• Date: 1998

Authors

Montenegro N (Author) FMUP; Ramos, C (Author) Other; matias, a (Author) Other; Barros H (Author) FMUP

Journal

Title: Ultrasound in Obstetrics and Gynecology

Vol. 11

Pages: 274-276

ISSN: 0960-7692

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 10 Citations

Scopus - 14 Citations

Other information

Authenticus ID: P-001-88N

DOI: 10.1046/j.1469-0705.1998.11040274.x

Abstract (EN): The aim of this study was to investigate changes in heart rate, namely the intraindividual variation, in normal embryos/fetuses between 6 and 13 weeks' gestation. A prospective study was performed of 41 singleton pregnancies undergoing routine ultrasound examination during the first trimester of pregnancy. For each case, the embryonic/fetal heart rate was measured on three consecutive occasions with a mean interval of 4 min. The difference in heals' rate values between the serial measurements varied from 0 to 18 beats/min and was significantly associated with gestational age (Spearman r = 0.26, p < 0.01). In the group of 15 fetuses (examined before 10 weeks' gestation), the difference between measurements (median = 0 beats/min, range 0-8 beats/min) was significantly lower (z=2.48, p < 0.05) than in fetuses assessed after 10 weeks of gestation (median = 3, range 0-18 beats/min). Reliable and reproducible information concerning embryonic/fetal heart rate may be obtained from a single measurement, especially when pregnancies are examined before 10 weeks of gestation.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 3