This diagnosis was based on a symptom-generated ultrasound that showed an empty gestational sac; a gestational sac with a yolk sac but no embryo when the mean gestational sac diameter was less than 20 mm or less than 30 mm; or an embryo with an absent heart beat and a crown-rump length
of less than 6 mm or less than 8 mm.
Provide participants with the tools and knowledge needed to evaluate and interpret nuchal translucency and crown-rump length
Statistical tests used were analysis of variance (ANOVA) for litter size, analysis of covariance (ANCOVA) using litter size as a covariate for newborn weight and crown-rump length
, implantation sites, and resorptions, and repeated-measures ANCOVA for weight changes during pregnancy, where weight of the mother at GD6, 9, 12, 15, and 18 was the repeated measure and weight at GDO was the covariate.
The fetus weighed 96 g and had a crown-rump length
Viability was 100% in 38 pregnancies in which fetal heart rates exceeded 100 beats per minute and embryos were determined to be growing appropriately at 5-6 weeks based on crown-rump length
on ultrasound, explained Dr.
Other factors predicting absent nasal bone in karyotypically normal fetuses included greater crown-rump length
In normal pregnancies, crown-rump lengths
increase by 1 mm/day, and the days of gestational age can be estimated by adding the crown-rump length
plus 42, Dr.
Adult females in this collection yield the following reproductive information: 26 June 1996, two pregnant, each with one fetus, measuring 28 and 31 mm in crown-rump length
, and one with no evident reproductive activity; 17 July 1996, one with no evident reproductive activity.
The mean crown-rump length
also was similar between sexes, at 62.
The individual (TTU 68598, TK 48160), a pregnant female (4 embryos, crown-rump length
9 mm), was acquired on 5 August 1995 from a locality in Big Bend Ranch State Park (UTM coordinates 13 601619E 3260741N).
Eighty women with embryonic or fetal demise or anembryonic pregnancies with a crown-rump length
less than 41 mm or a mean sac diameter less than 46 mm were randomized to receive 800 [micro]g of misoprostol alone or with 2 mL of saline added.