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The development of the fetal ovary has been studied in cattle (Hashimoto & Eguchi, 1955; Sakai, 1955; Henricson & Rajakoski, 1966), pigs (Black & Erickson, 1968), rats (Beaumont & Mandl, 1962) and man (Baker, 1963). In cattle, the ovaries remain attached to the mesonephros until the fetus reaches a crown-rump length of 11 cm, and the descent is completed when the crown-rump measurement is 21-5 cm (Sakai, 1955). The weight of the ovary steadily increases, coincident with the increase in the number of germ cells, from the 50th day post coitum (Sakai, 1955; Erickson, 1966), and there is

THE PRENATAL DEVELOPMENT OF THE BUFFALO OVARY