The present invention relates to a female mammal contraceptive process consisting of the sequential administration for at least 28 days of a gestagen in an ovulation-preventing dose for at least 28 days in combination with a natural oestrogen for 5 to 10 days at the end of the sequential dosage of at least 28 days, and a contraception kit. Common intent categories are identified for the queries requesting similar information. One jaw is attached to one end of the instrument body, while the other jaw is attached to the end of a lever arm. The throttle control module generates the desired throttle opening based on the measured accelerator position and a selected one of the first and second mappings. The method measures the total anionic charge and controls the net charge of an aqueous stream.