Sino-implant (II)/Levoplant is a hormonal contraceptive made up of two flexible rods inserted into a woman's upper arm. The implant works by releasing a hormone called levonorgestrel, which is slowly and continuously released over time.

Sino-implant (II)/Levoplant works by preventing a woman's eggs from leaving her ovaries. It also thickens cervical mucus, making it hard for sperm to unite with an egg. When sperm cannot unite with an egg, pregnancy cannot occur.

Sino-implant (II)/Levoplant must be removed after three or four years of use,depending on the national registration. A new set of rods can be inserted at that time if continued protection against pregnancy is desired. After removal of the rods, there is no delay in a woman's return to fertility.

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