crown-rump


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CROWN-RUMP: Ultrasonographic image of a fetus aged 9 weeks and 3 days. The crown-rump length is highlighted.

crown-rump

(krown′rŭmp′),

CR

The axis for measurement of a fetus, from the tip of the head to the tip of the sacrum.
See: illustration
References in periodicals archive ?
Newborn weight and crown-rump length after in utero exposure to a commercial mixture of 2,4-D, mecoprop, and dicamba during pregnancy in different seasons (mean [+ or -] SD).
When the 5- to 6-week ultrasound shows a reassuring crown-rump length and a fetal heart rate over 100, "we can give very positive reinforcement to couples, which is a wonderful thing you can do for them," Dr.
Fetal heart rates and crown-rump lengths were obtained between weeks 10 and 14 by M-mode and transvaginal or transab-dominal ultrasound, reported Dr.
In all groups, fetal heart rate decreased significantly with increasing crown-rump length, and the investigators determined that the ethnic variations in heart rate remained after controlling for crown-rump length.
One female specimen (TTU 63394) was gravid with three fetuses measuring 19mm in crown-rump length.
A single specimen (TTU 63331) was gravid with three fetuses measuring 5 mm in crown-rump length.
A female (TTU 61916), this shrew carried five fetuses that measured 6 mm in crown-rump length on 2 August 1992.
Neither of two March-taken females was pregnant, but two captured in April had fetuses measuring 9 and 11 in crown-rump length.
In females, uteri were inspected for the presence of fetuses or placental scars; number, location, and crown-rump length of fetuses were recorded, if present; and mammae were examined for signs of recent lactation.
gnomus carried a fetus having a crown-rump length of 20.