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DISC ELECTROPHORETIC PATTERNS OF UTEROGLOBIN AND SERUM PROTEINS IN RABBIT BLASTOCOELIC FLUID

Specific proteins exist in the uterine fluid of the rabbit, but not in the maternal blood serum. These have been named `blastokinin' Krishnan & Daniel, 1967) and `uteroglobin' (Beier, 1968a). It appears on the basis of their physiochemical properties that blastokinin and uteroglobin may be identical. Blastokinin appears in uterine fluid at 3 days post coitum (p.c.) and reaches maximal concentrations at 5 days p.c., disappearing by the 9th day. It also occurs in blastocoelic fluid at 6 days p.c. (Beier, 1968b). The purpose of this investigation was to study the ontogeny of uteroglobin and serum proteins in the blastocoelic fluid of the rabbit in relation to implantation.

Adult, nulliparous, New Zealand white rabbits were mated twice with two fertile bucks and injected intravenously with 20 i.u. human chorionic gonadotrophin immediately