Ovosiston | definition of ovosiston by Medical dictionary
An oral contraceptive that consists of a mixture of a progestin and an estrogen.
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References in periodicals archive
(2mg chlormadinone acetate, 0.1 mg mestranol) was shown in 1969 to be associated with a lower mean speaking frequency by 0.8 half-tone as well as an increase in vocal intensity by 5dB in lower third of pitch range.