| Literature DB >> 2204528 |
M van Heeswijk1, J G Nijhuis, H M Hollanders.
Abstract
Heart rates were measured by transvaginal sonography twice weekly in ten first trimester fetuses in women who conceived after in-vitro fertilization (IVF) or zygote intra-fallopian transfer (ZIFT). From week 6 to week 9 of menstrual age a rapid increase of the mean heart rate was observed from 113 to 167 beats per min, followed by a slow decrease to 156 beats per min. A close correlation between crown-rump length and heart rate was established.Entities:
Mesh：
Year: 1990 PMID： 2204528 DOI： 10.1016/0378-3782(90)90181-h
Source DB: PubMed Journal: Early Hum Dev ISSN： 0378-3782 Impact factor: 2.079