db186a7d_etriosis_org__The_Global_Forum__Dosage
[Generic name] Goserelin [Brand name] Zoladex [Form] Monthly or three-monthly injection [Dosage] 
Goserelin is embedded in a small biodegradable implant about the size of a grain of rice. The implant is injected under the skin in the lower half of the abdomen once a month.
GnRH « Endometriosis.org: The Global Forum
Dosage