DOI: 10.1055/s-00000072

Seminars in Reproductive Medicine

References

Zheng SR, Zheng HM, Qian SZ, Sang GW, Kaper RF.
A randomized multicenter study comparing the efficacy and bleeding pattern of a single-rod (Implanon) and a six-capsule (Norplant) hormonal contraceptive implant 
Contraception 1999; 60(1): 1-8  

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