Effect of infused hypothalamic phospholipids on the maturation of foetal rabbit lungs

The effect of hypothalamic phospholipids on the maturation of foetal lung was investigated in a series of experiments in rabbits. Sixteen pregnant does were injected with hypothalamic phospholipids (2 mg day −1 kg −1 ) from day 21 of gestation. A second group of 16 does was injected with saline, and served as controls. The foetuses were delivered at gestational ages between 27 and 28 days by means of caesarean section under intravenous pentothal anaesthesia. Foetuses born from treated mothers were more active, breathed better, and their lungs expanded to a greater extent compared with the foetuses born to control mothers. In the animals of treated mothers there was, on electron microscopy, evidence of accelerated maturation of alveolar epithelial cells.