title: Carbonic anhydrase activity in human cervical mucus and its response to various contraceptives regimes.
abstract: Carbonic anhydrase activity is present in human cervical mucus throughout the normal menstrual cycle. Lowest activity occurs in the ovulatory phase. A similar pattern of activity is seen in the presence of either an 'inert' or copper-releasing intrauterine contraceptive device (IUCD). The overall levels of activity are not significantly altered by the presence of either type of IUCD. A cyclic pattern of activity is retained even though endogenous ovarian function is suppressed by combined oestrogen-progestogen oral contraceptives.
mesh_terms: D002256:Carbonic Anhydrases / Q000378:metabolism*; D002582:Cervix Mucus / Q000201:enzymology*; D003267:Contraception; D003277:Contraceptives, Oral, Combined; D005260:Female; D006801:Humans; D007435:Intrauterine Devices, Copper; D007436:Intrauterine Devices, Medicated; D008598:Menstruation
chemical_list: D003277:Contraceptives, Oral, Combined; D002256:Carbonic Anhydrases