Preparation of saline infusion from fresh placenta
Fresh sheep placenta cleaned as already described was weighed and put into a beaker containing normal saline such that 1 g of placenta was in 1 ml of saline. After 3 h, the saline infusion was filtered through gauze and then through What man paper. The filtrate was stored in a refrigerator at 4°C. The weight of the extract was expressed as weight of fresh placenta yielding that quantity of extract.