is widely accepted that for lung development to proceed normally, physical space in the fetal thorax must be adequate and amniotic fluid must be brought into the lung with fetal breathing movements. Thus, it follows that extrinsic compression of the fetal thorax causes hypoplasia, either by inhibiting respiratory movements or by forcing out fluid from the lungs. The latter hypothesis was suppor...

TLRs are pattern recognition transmembrane receptors that play key roles in innate immunity. A recently discovered soluble truncated form of TLR2 (sTLR2) acts as a decoy receptor, down-regulating the host inflammatory response to bacteria. To identify the presence and functional role of sTLR2 in modulating the intraamniotic inflammatory response to infection, we studied 109 amniotic fluid sampl...

Experiments were performed to determine the effect of amniotic fluid dilution on the rate of intramembranous absorption. Seven fetal sheep at 118 days gestation were instrumented with a shunt between the trachea and esophagus and arterial and venous vascular catheters. In addition, the urachus of the fetal bladder was ligated, and a catheter was placed in the bladder. Ligation of the urachus do...

Premature rupture of membranes (PROM) is a common obstetric complication frequently occurring with concomitant chorioamnionitis. The present study aimed to evaluate levels of soluble triggering receptor expressed on myeloid cells-1 (sTREM-1) in serum and amniotic fluid in pregnant women with PROM and to compare sTREM-1 with the commonly used labor...

A 35-year-old pregnant woman visited our department and had been treated with 100 µg of daily oral levothyroxine for hypothyroidism. An ultrasonography screening was performed at 25 weeks gestation and revealed a fetal goiter and an increased amniotic fluid volume. Fetal hypothyroidism was confirmed by cordocentesis and amniotic hormone levels at 26 weeks gestation. We treated the mother with 2...

Six fetal sheep were operated on at 118 to 121 days of gestation. The pulmonary end of the trachea was connected to the gastric end of the esophagus with a section of tubing. This left urine as the only source of amniotic fluid and intramembranous absorption as sole exit. Multiple indwelling fetal vascular, intra-amniotic, allantoic, and a fetal bladder catheter were placed. Beginning 5 days af...

We examined whether the 33-kDa serine protease prostate-specific antigen (PSA) is present in amniotic fluid and, if so, whether its concentration changes with gestational age. Analyzing 115 amniotic fluids with a highly sensitive immunofluorometric procedure, we found PSA in all the amniotic fluids examined and established that its concentration increases with increasing gestational age from 11...

Fetal fluid was studied in mice of the Q, C57BL/McL, C3H/Bi/McL and JU/Fa strains. The amount increases to day 16 of gestation, and then decreases. Amniotic fluid and fetal plasma contain three transferrins, five alpha-fetoproteins and albumin. Protein concentration in both increases during gestation; glucose decreases in amniotic fluid although it rises in fetal plasms; urea levels remain cons...

BACKGROUND Oligohydramnios (reduced amniotic fluid) may be responsible for malpresentation problems, umbilical cord compression, concentration of meconium in the liquor, and difficult or failed external cephalic version. Simple maternal hydration has been suggested as a way of increasing amniotic fluid volume in order to reduce some of these problems. OBJECTIVES The objective of this review w...