The synthetic progestins used for contraception so far are structurally related either to
testosterone (estranes and gonanes) or to progesterone (pregnanes and 19-norpregnanes) …

The 19-nor derivatives of progesterone are referred to as “pure” progestational molecules as
they bind almost exclusively to the progesterone receptor (PR) without interfering with …

The progestins have different pharmacologic properties depending upon the parent
molecule, usually testosterone or progesterone (P), from which they are derived. Very small …

The synthetic progestins used so far for contraception and menopausal hormone therapy
are derived either from testosterone (19-nortestosterone derivatives) or from progesterone …

Nestorone®(Nestorone 16-methylene-17α-acetoxy-19-norpregn-4-ene-3, 20-dione),
formerly referred to as ST 1435, is a potent progestin when given parenterally via sustained …

Contraceptive vaginal rings delivering various progestins alone or in combination with
estrogen have been previously studied, showing adequate steroid vaginal absorption and …

New generation oral contraceptives containing desogestrel or gestodene, and possibly also
norgestimate, are more or less similar with respect to contraceptive efficacy, cycle control …

The term progestogen has been widely utilized to indicate the general class of agents that
includes both progesterone and its synthetic analogs, whereas the term progestin refers only …

The objective of this study was to evaluate the contraceptive efficacy and clinical
performance of a Nestorone subdermal implant (NES) in the postpartum period. NES (n …

The progestins have different pharmacological properties depending upon the parent
molecule, usually testosterone or progesterone, from which they are derived. Very small …