The demonstration of chromosome abnormalities associated with spontaneous abortions in humans (Carr, 1963) has prompted the investigation of chromosomes from embryos of other mammalian species. This communication describes a method for the demonstration of chromosomes from early pig embryos. A gilt is mated on the 1st day of oestrus and again on the following day, if she will accept the boar. On the 10th day after the original mating, the pig is slaughtered and the cervix, uterus, oviducts and ovaries are removed as a unit.