Evaluation of respiratory gases and acid-base gradients in human fetal fluids and uteroplacental tissue between 7 and 16 weeks' gestation
Objective: Our purpose was to evaluate the changes in intrauterine gases and acid-base
gradients inside the human fetoplacental unit at 7 to 16 weeks' gestation. Study Design:
Respiratory gases and acid-base values were recorded by means of a multiparameter
sensor and samples from inside the exocoelomic or amniotic cavity, placental tissue,
decidua, and fetal blood of 30 early pregnancies. Results: Before 11 weeks' gestation,
placental PO2 was 2.5 times lower than decidual PO2. The PO2 increased independently at …
gradients inside the human fetoplacental unit at 7 to 16 weeks' gestation. Study Design:
Respiratory gases and acid-base values were recorded by means of a multiparameter
sensor and samples from inside the exocoelomic or amniotic cavity, placental tissue,
decidua, and fetal blood of 30 early pregnancies. Results: Before 11 weeks' gestation,
placental PO2 was 2.5 times lower than decidual PO2. The PO2 increased independently at …