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Biomedical subjects

R Amster

Publications and source records attributed to R Amster.

6 recordsLinked to original sources
PubMed1996

Transvaginal ultrasonographic measurements of endometrial thickness: a reproducibility study.

OBJECTIVE: The study was undertaken to assess the reproducibility of endometrial thickness measurements by transvaginal ultrasonography (TVS). METHODS: In a prospective blind study, two examiners measured the endometrial thickness of 25 patients by TVS on two separate occasions 30 minutes apart. RESULTS: The reliability test performed for each examiner was statistically less significant for the intra-observer variation of each observer (r = 0.95 and r = 0.93), than between both examiners (r = 0.85). Although there was no statistically significant difference between the observations, the mean range of observations was 2.12 + 1.27 mm. CONCLUSIONS: A safety margin of error should be taken into consideration while recommending a cutoff under which no curettage is needed.

Adult↗
PubMed1991

Success rates in in vitro fertilization treatment and its correlation with high titer antibodies for Chlamydia trachomatis.

The prevalence of specific chlamydial IgG and IgA antibodies was determined in 86 infertile women undergoing in vitro fertilization (IVF) and in 56 male partners; 32.5% of women (28 of 86) under investigation had both types of antibodies at a titer of IgG greater than or equal to 1:128 and IgA greater than or equal to 1:16; 9% of their male partners (5 of 56) who were tested were also seropositive. The prevalence of local IgA in semen was 9.6% (5 of 52). Pregnancy was later achieved by IVF in 13 of 32 seropositive and 19 of 32 seronegative women. Our data suggest that high levels of specific antichlamydial antibodies (IgG and IgA) are not correlated with the outcome of IVF-embryo transfer treatment.

Adult↗
PubMed1989

Bacterial infection and human fetal wastage.

Twenty-eight of 57 fetuses delivered after intrauterine death were found to have a variety of aerobic and facultative bacteria in the heart, anus, placenta, brain and cerebrospinal fluid. Subclinical maternal bacteremia, possibly originating in the urinary tract, appears to be a common cause of second- and third-trimester fetal demise.

Amniotic Fluid↗
PubMed1985

Typhoid fever complicating pregnancy.

Typhoid fever in pregnancy may result in infection of the fetus, with consequent abortion. Currently, it is a rare complication of pregnancy in the industrially developed countries. This report documents a case of maternal typhoid fever with septic abortion, in which trans-placental infection of the fetus caused its demise.

Abortion, Septic↗
PubMedDate not supplied

Doppler velocimetry of the umbilical artery as a predictor of pregnancy outcome in pregnancies characterized by elevated maternal serum alpha-fetoprotein and normal amniotic fluid alpha-fetoprotein.

OBJECTIVE: Women with elevated maternal serum alpha-fetoprotein (MSAFP) and normal amniotic fluid alpha-fetoprotein (AFAFP) are at an increased risk of an adverse pregnancy outcome. Such MSAFP elevations are probably the consequence of transplacental leakage caused by placental abnormalities. These may result in disturbed bloodflow through placental vessels. The purpose of this study was to assess whether measurement of such disturbances by Doppler velocimetry of the umbilical artery has a predictive value for pregnancy outcome. STUDY DESIGN: The study group consisted of 85 patients, in whom the only finding was elevated maternal serum alpha-fetoprotein. Systolic/diastolic (S/D) ratios were calculated using a continuous wave Doppler measurement of the umbilical artery, performed at 6 to 8-week intervals. Serial results for each individual were incorporated into a single 'Velocimetry Score'. RESULTS: In group B (14 patients) with an abnormally elevated umbilical S/D ratio, a higher incidence of intrauterine growth retardation (42.9%), preterm deliveries (78.6%), and fetal loss (42.9%) was noted, as compared with group A (71 patients) with a normal S/D ratio. CONCLUSIONS: Umbilical artery Doppler velocimetry may serve as a predictor of pregnancy outcome in the high-risk group characterized by elevated MSAFP.

Adult↗