[Swine fetal membrane and myometrium lipids in ontogenesis].

Phospholipids and the levels of linoleic, dihomo-gamma-linolenic, arachidonic and eicosapentaenoic acids in its particular fractions in amnion, allantois and myometrium in pigs during pregnancy were investigated. A permanent rise in linoleic, dihomo-gamma-linolenic and arachidonic acid levels with advancement of gestation was observed. Eicosapentaenoic acid levels in such tissues, as well as the levels of above-mentioned acids in myometrium were greatly unchanged during the period thus analyzed. These results support the hypothesis that amnion and allantois are of great importance in prostaglandin biosynthesis during pregnancy in pigs.