Duration of human singleton pregnancies in Ibadan, Nigeria

Analysis of gestation length in an obstetric population of indigenous African women revealed a mean pregnancy duration of 274.8 days, which is similar to values recorded in women of African descent elsewhere, but about 1 week less than what generally has been reported in women of European ancestry and Japanese women. Factors associated with lower pregnancy duration among these women include increasing maternal age and gravidity, and the birth of a male infant. It is concluded that mean pregnancy duration in Nigerian women is shorter than the 280 days normally used in obstetric calculations. The consistent finding of a shorter length of gestation in these and other black women suggests earlier maturity of the fetoplacental unit. Earlier institution of antepartum fetal monitoring in women of African descent, particularly women > 30 years old and those with high parity, may reduce the risks of fetal morbidity and mortality attributable to postmaturity in their offspring.     

A simple and rapid determination of the lecithin/sphingomyelin (LS) ratio in amniotic fluids and in pharyngeal aspirates of newborn infants

A simple, rapid method for the routine determination of the lecithin/sphingomyelin (L/S) ratio in amniotic fluid and/or in pharyngeal aspirate of the newborn has been developed. In 33 samples of amniotic fluid at various gestational ages, an L/S ratio corresponding to the fetal age was found: in 16 samples of biochemically immature amniotic fluid (gestation age less than 34 weeks) the mean of the ratio was 1.26 and in 17 samples of mature amniotic fluid (gestation age greater than 35 weeks) the mean value was 3.02. Pharyngeal aspirates of 55 non-selected newborn were examined by the same method. The L/S ratio of 39 infants (gestation age greater than 38 weeks) gave a mean value of 7.3 and that of 16 premature infants (gestation age less than 37 weeks) a mean value of 5.5. In none of these cases did RDS develop after birth. The results suggest that the method is useful for the determination in both amniotic fluid and pharyngeal aspirate.     

The estimation of surface actitity of the lungs in dependence from duration of pregnancy (author's transl)

The surface tension of amniotic fluid was measured in a Langmuir balance in 98 persons with normal pregnancy between 23 and 42 weeks of gestation. An increase of surface activity in dependence of gestational ages was found. It is possible to use the surface tension of amniotic fluid as an indicator of fetal pulmonary maturity in high risk pregnancy.     

Clinical importance of intramural blood vessels in the sino-atrial segment of the conducting system of the heart

The perinatal implications of oligohydramnios prior to 37 weeks of gestation, in the absence of intrauterine growth restriction (IUGR), rupture of membranes or fetal anomalies, are unknown. We compared the outcomes of 65 women with oligohydramnios (amniotic fluid index ([AFI] < or = 8 cm) by sonography to those of a control group matched by sonogram indication. Study patients were between 17 and 37 weeks of gestation, with appropriately grown fetuses on index sonogram and no other detected explanation for amniotic fluid abnormalities. Patients were managed expectantly with fetal testing and follow-up sonograms for fetal growth. Delivery was not recommended solely for oligohydramnios until 37 weeks of gestation. Patients with isolated oligohydramnios prior to 37 weeks of gestation, when compared to a control group with normal amniotic fluid volume, had a significantly higher incidence of premature delivery (odds ratio [OR] 3.23, 95% confidence interval [CI] 1.4-7.3) but did not appear to be at increased risk of IUGR, intrauterine death, or birth asphyxia.     

Prevention of blindness in diabetic retinopathy]

PURPOSE: This study aimed to determine the clinical significance of echogenic amniotic fluid. METHODS: We prospectively studied 19 twin pregnancies in which the amniotic fluid in 1 sac was anechoic and that in the other sac was echogenic. Morphologic characteristics of amniotic fluid were assessed from samples taken at amniocentesis or upon delivery within 48 hours after sonographic examination. RESULTS: In twins with echogenic amniotic fluid, assessment revealed clear fluid in 6 cases (32%), vernix caseosa in 12 (63%), and meconium in 1 (5%). In co-twins with anechoic amniotic fluid, assessment revealed clear fluid in 9 cases (47%), vernix caseosa in 6 (32%), and meconium in 4 (21%). CONCLUSIONS: Echogenic amniotic fluid on prenatal sonography is not predictive of meconium.     

Abnormal twin pregnancy--early resorption of a single fetus in a twin pregnancy pregnancy]

INTRODUCTION: Twin pregnancy presents a condition of development of two fetuses in the uterus and can be monozygotic (single ovum) and dizygotic (two ova). In case of fertilization and segmentation of one ovum monozygotic twins are produced, while in case of fertilization of two ova, which can originate from one or two Graff follicles, dizygotic twins are developed. The ratio of twin and single pregnancies is 1:89 (according to Hellin's law) (1). The incidence of twin and other multiple pregnancies is influenced by: race of parents, age and parity of mother, use of clomid and gonadotrophin to stimulate ovulation, discontinued use of contraceptive pills and certain seasons (exposure to sunlight) (1). Due to occurrence of numerous complications twin pregnancy and parturition are considered to be highly risky. This is supported by clinical data on more frequent spontaneous abortions--especially in monozygotic pregnancies, hypertension in pregnancy, hemorrhage of various etiologies, anemias, early rupture of amniotic membranes, hydramnios, premature deliveries, etc. Nowadays diagnosis of both twin and other multiple pregnancies in the early stage is required, in order to establish normal or pathological development of such pregnancies. As early as 6 gestation week in twin pregnancies it is possible to sonographically visualize two gestation sacs in the uterus, while in 7-8 gestation weeks it is possible to see two embryos with evidence of fetal heart rate. In early pregnancy a differentially-diagnosed uterus may be clinically enlarged due to: hydratidaform mole, uterine mioma or ovarian cyst. In later gestation confirmation of twin pregnancy is possible by clinical and sonographic examination and biochemical analyses (elevated values of HPL and -fetoprotein) and less frequently, by x-ray. Repeated sonographic examinations can reveal the following anomalies of twin pregnancies: one normal pregnancy with one sac containing no embryo, one sac containing no embryo and one sac with a dead fetus, fetuses without vitality in both gestation sacs, two ultrasound echoes from which only one normal fetus and one dead mummified fetus (fetus papiraceus) result within the uterus. One gestation sac may be resorbed during pregnancy, while the undamaged fetus continues to develop normally in the uterus. In certain cases the loss of one fetus is not accompanied by any clinical symptoms, and in others this can be accompanied by light hemorrhage. An initial twin pregnancy after the loss of one twin may end by a birth of one healthy infant. CASE REPORT: A patient aged 35 years, came for gynecological examination due to missed menstruation. Ananmesis showed that she had a nascent uterine myoma which was removed by myomectomy six months earlier, had one parturition four years earlier, and no abortions. The last menstrual period was on February 12, 1991. Clinical examination showed a somewhat larger uterus than would be normal for amenorrhea of 9-gestation week. By sonographic examination two regular gestation sacs were found in the uterus with fetal echoes present as well as heart rate in both fetuses (Figure 1). Embryo measurements were as follows: Fetus 1-CRL-22.5 mm, NEG-8 + 4, heart rate present. Fetus 2-CRL-23.6 mm, NEG-9, heart rate present (Figure 2). The patient was cautiously informed that two fetuses are visible in the uterus and that this is a sign of twin pregnancy, but for certain diagnosis a control examination was scheduled two weeks later. The sonographic examination after 14 days later showed discord in fetal growth (Figure 3). Embryo measurement in 11-gestation week rendered the following parameters: Fetus 1-CRL-22.8 mm, NEG 8 + 6, no heart rate registered (Figure 4), while the second fetus continued to develop and had the following characteristics: Fetus 2-CRL-50.5 mm, NEG 11 + 4, heart rate and fetal movement registered (Figure 5). During entire pregnancy the patient suffered no pain or any kind of hemorrhage. She took no drugs. (ABST     

Amniotic fluid testosterone levels in midpregnancy

Amniotic fluid testosterone levels were measured on specimens obtained between 12 and 25 weeks' gestation from 58 male-fetus and 77 female-fetus pregnancies. For the male fetuses the mean +/- SE amniotic fluid testosterone level of 223 +/- 10 pg/ml was significantly higher (P less than 0.001) than the concentration found for the female fetuses (40 +/- 2 pg/ml). The ranges were 104-424 and 18-82 pg/ml, respectively, for the same fetuses. In the male fetuses the highest mean level was found during the 17th gestational week, but the mean level observed during any 1 week was not significantly differenf from any other week for both sexes. These data are consistent with the concept that amniotic fluid testosterone levels may be a rapid and effective method for establishing fetal sex in utero during midgestation.     

Target position variability throughout prostate radiotherapy

OBJECTIVE: It was our objective to evaluate the association between early maternal weight gain (before 20 weeks), midpregnancy weight gain (20-28 weeks), and late pregnancy weight gain (28 weeks to birth) with fetal growth and birth weight in twins. STUDY DESIGN: This historic cohort study was based on 1564 births of live twins >/=28 weeks' gestation from Baltimore, Maryland, Miami, Florida, Charleston, South Carolina, and Ann Arbor, Michigan. RESULTS: Early fetal growth was affected only by smoking and chorionicity. Factors in models of both mid and late fetal growth included maternal age, pregravid weight, parity, rates of early pregnancy and midpregnancy maternal weight gain, smoking, and pre-eclampsia. Increased midpregnancy fetal growth was associated with early maternal weight gain (10.91 g/wk per pound per week) and midpregnancy maternal weight gain (15.89 g/wk per pound per week). Increased late fetal growth was associated with early maternal weight gain (16.86 g/wk per pound per week) and midpregnancy maternal weight gain (23.88 g/wk per pound per week). Increased birth weight was associated with early (283.02 g per pound per week), mid (163.58 g per pound per week), and late (69.76 g per pound per week) maternal weight gains. CONCLUSIONS: These findings confirm the importance of early maternal weight gain in twin fetal growth and birth weight.     

Randomised study of risk of fetal loss related to early amniocentesis versus chorionic villus sampling

BACKGROUND: Several cohort studies have shown the feasibility of early amniocentesis (between 11 and 13 weeks of gestation) as an alternative to chorionic villus sampling (CVS) for karyotyping, but the only completed randomised study of fetal safety showed a significant fetal-loss risk related to first-trimester amniocentesis. We assessed fetal safety in early amniocentesis and CVS. METHODS: We assessed early amniocentesis at 11-13 weeks gestational age compared with the fetal risk associated with CVS at 10-12 weeks. 1160 pregnant women were randomly assigned one procedure (581 early amniocentesis, 579 CVS) after a baseline ultrasound examination at 10 weeks' gestation and were followed up until birth. Total fetal loss and neonatal morbidity were the primary outcome measures. Sampling success and pregnancy complications were secondary outcomes. We used a filter to increase the cell yield in the early amniotic-fluid samples. CVS was transabdominal. FINDINGS: We found a significantly increased occurrence of talipes equinovarus in the early amniocentesis group (p < 0.01), the risk of which was associated with sampling at the earliest gestational ages and with temporary leakage of amniotic fluid after sampling. Therefore, the trial was stopped early, which reduced the power of the safety study. 4.8% (27) of fetuses in the CVS group and 5.4% (30) in the early amniocentesis group were lost after randomisation (p = 0.66). More detailed survival analysis did not show any significant differences in fetal loss rates. Leakage of amniotic fluid after sampling occurred significantly more frequently after early amniocentesis than after CVS (p < 0.001), but we found no other major differences in pregnancy complications. Significantly more CVS than early amniocentesis procedures were repeated or failed to produce a karyotype (p < 0.01). INTERPRETATION: Even though the numbers were small, we found an association between early amniocentesis and talipes equinovarus. We believe this association to be true, since it supports a trend in a similar randomised study. Our results show that early amniocentesis, when done with the filter technique, is associated with an abortion risk similar to CVS, although the limited size of our study population reduced the strength of this conclusion.     

The natural interleukin-1 receptor antagonist in the fetal, maternal, and amniotic fluid compartments: the effect of gestational age, fetal gender, and intrauterine infection

OBJECTIVES: The interleukin-1 receptor antagonist is a newly discovered cytokine that blocks the biologic effects of interleukin-1 in vitro and in vivo. This cytokine is a physiologic component of amniotic fluid and is considered to be of critical importance in the homeostasis of the cytokine network. This study was undertaken to systematically examine the bioavailability of interleukin-1 receptor antagonist in the maternal, fetal, and amniotic fluid compartments during term and preterm parturition in women with and without microbial invasion of the amniotic cavity. STUDY DESIGN: The patient population consisted of (1) pregnant women in the midtrimester (n = 42), (2) patients who underwent cordocentesis for diagnostic purposes (n = 39), (3) patients with preterm labor (n = 126), (4) women with term gestation (n = 102), and (5) healthy nonpregnant women (n = 8). Amniotic fluid was cultured for aerobic and anaerobic bacteria, as well as Mycoplasma sp. Interleukin-1 receptor antagonist concentrations were determined by enzyme-linked immunoassay in maternal and fetal plasma, amniotic fluid, and neonatal urine. Microbial invasion of the amniotic cavity was defined as the presence of a positive amniotic fluid culture for microorganisms. RESULTS: (1) Interleukin-1 receptor antagonist was normally present in fetal plasma samples obtained by cordocentesis, and its concentration increased with advancing gestational age (n = 39; r = 0.61, p < 0.001). (2) Patients at term not in labor had higher amniotic fluid interleukin-1 receptor antagonist concentrations than patients in the midtrimester (median 40.1 ng/ml, range 5.7 to 213.1 vs median 16.2 ng/ml, range 3.2 to 62.2, respectively, p < 0.001). (3) Amniotic fluid and cord plasma interleukin-1 receptor antagonist concentrations were significantly higher in patients with preterm labor and microbial invasion of the amniotic cavity than in those without microbial invasion of the amniotic cavity (amniotic fluid: median 219.9 ng/ml, range 35.4 to 504 vs median 80.6 ng/ml, range 24.3 to 399, respectively, p < 0.001; umbilical cord plasma: median 4.8 ng/ml, range 0.3 to 167.0 vs median 1.0 ng/ml, range 0 to 276.0, respectively, p < 0.05). In contrast, these differences were not found in patients with term labor either with or without microbial invasion of the amniotic cavity. (4) In both term and preterm patients the amniotic fluid and neonatal urine concentrations of interleukin-1 receptor antagonist were significantly higher in female fetuses than in male fetuses (amniotic fluid, preterm: median 191.9 ng/ml, range 51.6 to 504.0 vs median 61.1 ng/ml, range 11.5 to 284.9, respectively, p < 0.001; amniotic fluid, term: median 58.7 ng/ml, range 25.5 to 264.0 vs median 33.9 ng/ml, range 3.4 to 132.4, respectively, p < 0.001; neonatal urine: median 317 ng/ml, range 59.0 to 440.8 vs median 12.2 ng/ml, range 2.5 to 61.6, respectively, p < 0.005). CONCLUSIONS: (1) Interleukin-1 receptor antagonist is physiologically present in the fetal, maternal, and amniotic fluid compartments; (2) microbial invasion of the amniotic cavity in the preterm gestation is associated with a significant increase in the concentrations of this cytokine in the fetal and amniotic fluid compartments but not in maternal plasma; (3) fetal urine is a source of amniotic fluid interleukin-1 receptor antagonist; (4) fetal plasma interleukin-1 receptor antagonist concentrations increase with gestational age; (5) there is a significant effect of fetal gender in amniotic fluid and neonatal urine concentrations of interleukin-1 receptor antagonist.     

True trisomy 15 mosaicism, detected by amniocentesis at 12 weeks of gestation and fetal echocardiography

A case of mosaicism of trisomy 15, with two-thirds of the cells trisomic, was detected at 12 weeks of gestation in amniotic fluid cell cultures obtained with the filtration technique. Ultrasound examination at 13 weeks showed a nodule protruding into the amniotic cavity which was speculated to be remnants of a co-twin, causing the trisomic cell line. At 20 weeks of gestation, a malformation scan (level III) was normal, but supplementary fetal echocardiography revealed a severe cardiac defect (mitral atresia and a ventricular septal defect). Fetal lymphocytes obtained by cordocentesis showed trisomy 15 mosaicism, but only in 5 per cent of the mitoses. After termination, the same percentage of trisomy 15 mosaicism was found in cells from skin and tendon as in the original early amniocentesis. No sign of earlier twinning was found in the placenta or membranes. We conclude that mosaicism in early amniotic fluid obtained by the filter technique in this case reflected the true karyotype accurately and that supplementary echocardiography added significantly to the interpretation of the clinical implications.     

Changes in human amniotic fluid fibrinolytic inhibitor levels during pregnancy

The amniotic fluid (AF) when incubated with the patient's own plasma diminishes the lytic activity of the plasma. It is suggested that this inhibition is due to the presence of fibrinolytic inhibitors in the AF. The inhibitors rate increases as pregnancy advances. Evaluating these inhibitors in a group of 65 women before and after the 38th week of pregnancy, a higher rate of fibrinolytic inhibitors is found after the 38th week. The said differences are statistically significant. For the moment it does not seem that the increasing of the inhibitors in the last part of pregnancy might be used as a fetal maturity test.     

A two-dimensional protein map of human amniotic fluid at 17 weeks' gestation

Using updated technical procedures (immobilized pH gradients for isoelectric focusing followed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis: IPG/SDS-PAGE) we provide a two-dimensional (2-D) map of amniotic fluid (AF) proteins. This map comprises over 800 silver-stained spots. Over 150 spots have been identified by matching on the net with human plasma and cerebrospinal fluid maps available from SWISS 2DPAGE database; several additional spots were assigned by immunoblotting and/or microanalytical techniques. This report details our investigation on AF proteins focusing on the 17th week of gestation, when AF is most commonly used for clinical evaluation of fetal disorders. As a whole, the map displays a number of potential markers for fetal development and for gestation abnormalities. The 2-D electrophoretic technique allows the monitoring of all these proteins at the same time along with additional spots that may prove of diagnostic significance.     

DNA amplification polymorphisms of Mucor piriformis

OBJECTIVE: The aim was to determine the chorionic and amniotic types in multifetal pregnancies with transvaginal ultrasonography at very early stage of gestation. STUDY DESIGN: Twenty-one spontaneous multifetal pregnancies were scanned transvaginally before 8 weeks' gestation (four of them from 4th week). The chorionic and amniotic type was determined ultrasonographically. All twin gestations had postpartum pathologic evaluation of the placenta and histologic determination of the chorionic and amniotic type. RESULTS: Ultrasonographic evaluation of the 21 pregnancies demonstrated 20 twin and 1 triplet gestation. Four of the twin pregnancies were monochorionic-diamniotic. Triplet was monochorionic-triamniotic (spontaneously aborted in 8th week of gestation). In all 20 twin pregnancies, transvaginal ultrasonography correctly predicted the chorionic and amniotic type before 8 weeks of gestation. CONCLUSION: Transvaginal ultrasonography allows a reliable, simple and rapid determination; the dichorionic twin pregnancy in 4 weeks, monochorionic in 5 weeks, and differentiation of mono- or diamniotic in 7 weeks of gestation.     

Weakness of biochemical markers of nutritional and inflammatory status as prognostic indices for growth retardation and morbidity of young children in central Africa

BACKGROUND: Recurrent fetal loss has been well described in women with antiphospholipid antibodies. Such women also often have other autoantibodies commonly found in patients with systemic lupus erythematosus. Treating them with prednisone and aspirin may reduce the risk of fetal loss. METHODS: We screened 773 nonpregnant women who had the unexplained loss of at least two fetuses for antinuclear, anti-DNA, antilymphocyte, and anticardiolipin antibodies and for the lupus anticoagulant. Of 385 women with at least one autoantibody, 202 who later became pregnant were randomly assigned in equal numbers to receive either prednisone (0.5 to 0.8 mg per kilogram of body weight per day) and aspirin (100 mg per day) or placebo for the duration of the pregnancy. The women were stratified according to age (18 to 34 years or 35 to 39 years) and the week of gestation at which the previous fetal losses had occurred (< or = 12 or > 12 weeks). The primary outcome measure was a successful pregnancy. RESULTS: Live infants were born to 66 women in the treatment group (65 percent) and 57 women in the placebo group (56 percent, P=0.19). More infants were born prematurely in the treatment group than in the placebo group (62 percent vs. 12 percent, P<0.001). The major side effects of therapy in the mothers were hypertension (treatment group, 13 percent; placebo group, 5 percent; P=0.05) and diabetes mellitus (15 percent and 5 percent, P=0.02). CONCLUSIONS: Treating women who have autoantibodies and recurrent fetal loss with prednisone and aspirin is not effective in promoting live birth, and it increases the risk of prematurity.     

Regulation of erythropoiesis in fetus and mother during normal pregnancy

The activity of the hormone erythropoietin was assayed (1) in the amniotic fluid of healthy women in the tenth to 16th weeks of pregnancy who had artificial interruption of pregnancy and (2) in the urinary output of healthy pregnant and nonpregnant women. Erythropoietin activity in concentrated urine increased significantly between the 24th and 31st weeks of pregnancy. No erythropoietin activity was demonstrated in amniotic fluid at the tenth week of pregnancy, even when the fluid was concentrated, but it was demonstrated in concentrated amniotic fluid from the 11th to 16th weeks. The assay results prove, indirectly, the hypothesis that increased production of erythrocytes in pregnancy is mediated by the erythropoietin humoral mechanism in both fetus and mother. Erythropoiesis in the fetus probably is regulated by erythropoietin as early as the 11th week of pregnancy.     

Measurement of interleukin-1 alpha and interleukin-6 in pregnancy-associated tissues

The concentrations of interleukin-1 alpha (IL-1 alpha) and IL-6 in pregnancy-associated tissues were investigated in term labour and delivery in the absence of labour (elective Caesarean section). Samples of amniotic fluid, placenta, fetal membranes, umbilical venous and, where possible, umbilical arterial blood were collected at delivery (37-41 weeks of gestation). Maternal blood was sampled during labour. Fluid and tissue extracts were assayed for IL-1 alpha and IL-6 by radioimmunoassay. Placenta and membranes were examined histologically for evidence of infection. Concentrations of IL-1 alpha and IL-6 in amniotic fluid and membrane extract, and IL-1 alpha in maternal and fetal blood, were raised after the onset of labour. Concentrations of both cytokines in the placenta remained unchanged. There was a good correlation between concentrations of both cytokines in amniotic fluid and membranes. There was also a significant correlation between concentrations of IL-1 alpha and IL-6 in amniotic fluid, placenta and membranes. It is suggested that the fetal membranes or maternal decidua, but not the placenta, internal fetal or maternal tissues, are the main sources of IL-1 alpha and IL-6 during labour.     

Evidence of participation of the soluble tumor necrosis factor receptor I in the host response to intrauterine infection in preterm labor

PROBLEM: This study was conducted to determine whether: (1) the soluble tumor necrosis factor receptor I (sTNF-rI) is present in human amniotic fluid, neonatal urine, and the feto-maternal plasma; (2) there are changes in the concentration of the sTNF-rI in amniotic fluid with gestational age; and (3) microbial invasion of the amniotic cavity (in term and preterm parturition) is associated with changes in amniotic fluid sTNF-rI concentrations. METHOD: Amniotic fluid was retrieved by amniocentesis from 185 women classified into 11 groups according to gestational age (midtrimester, preterm gestation, and term), the presence or absence of labor, spontaneous rupture of membranes and microbial invasion of the amniotic cavity. sTNF-rI was assayed with a sensitive and enzyme-linked immunosorbent assay (ELISA) validated for amniotic fluid. In addition, sTNF-rI concentrations were determined in fetal blood obtained by cordocentesis in preterm gestations (N = 24) or at the time of delivery after spontaneous labor at term (N = 10). sTNF-rI concentrations were also measured in maternal venous and cord blood and neonatal urine (n = 13). RESULTS: sTNF-rI was found to be present in all amniotic fluid samples, maternal blood and fetal blood and neonatal urine samples; sTNF-rI concentrations were higher in the midtrimester than at term (mean +/- SD: 36.2 +/- 12.2 ng/ml versus mean +/- SD: 5.56 +/- 5.72 ng/ml [P < .05]); patients with preterm labor and microbial invasion of the amniotic cavity (with intact or with ruptured membranes) had significantly higher amniotic fluid concentrations of sTNF-rI than patients without microbial invasion; in the absence of microbial invasion, parturition (both term and preterm) was not associated with changes in amniotic fluid concentrations of sTNF-rI; neonatal urine contained the highest concentrations of sTNF-rI of all biological fluids assayed including maternal and neonatal/fetal blood and amniotic fluid. CONCLUSIONS: It was concluded that sTNF-rI is a physiologic constituent of amniotic fluid, as well as of the fetal and maternal plasma; that amniotic fluid sTNF-rI concentrations decrease as a function of gestional age and increases in the concentration of the sTNF-rI are part of the host response to intrauterine infection in preterm parturition.     

Antimicrobial activity of ethanol, glycerol monolaurate or lactic acid against Listeria monocytogenes

Cytogenetic data about 145 chorionic villus samples obtained between the 13th and 35th week of gestation are reported. 'Late' chorionic villus sampling (CVS) was used to resolve different situations: failed amniotic fluid cell cultures (5 cases); confirmation of an abnormal karyotype, previously diagnosed as mosaic (14 cases); and ultrasound fetal malformation (23 cases). Most of the samples (103 cases) were analysed for the classical indications and in these cases, the principal aim was to obtain a rapid fetal karyotype. Excluding the cases used to check fetal karyotype, a chromosomal aberration was found in 11 out of 131 biopsies. In four cases of the group in which the fetal karyotype was checked (14 cases), the pathology observed at the first diagnosis was confirmed, while in the remaining ten cases the anomaly was not observed.     

Mutations and deletions within the hepatitis B virus core antigen and locations of B cell recognition sites

One or more infants of a multifetal pregnancy occasionally require delivery selectively because of in utero risk of fetal death in circumstances in which the sibling fetus appears well. At 26 weeks 5 days of gestation a small fundally placed twin in a dichorionic gestation had an estimated fetal weight of 650 g with decreased amniotic fluid and ominous Doppler velocity findings in his umbilical artery. A normally grown presenting sibling had reassuring fetal surveillance data. Over a 2-week interval the growth-restricted twin showed no growth, and his status deteriorated. He was selectively delivered by hysterotomy. Selective delivery may offer parents of multifetal gestations an additional option when 1 or more of their fetuses are at high risk for in utero death.