This review discusses the various available controlled release products for contraception in
women as well as elaborates about the thermosensitive polymers, their characterization and application
for controlled delivery of contraceptive hormones. The thermosensitive polymers are free flowing
solutions in water at room temperature and turn into gel at body temperature and deliver the
incorporated hormones at controlled rate for longer duration after a single subcutaneous injection.
These polymers are biodegradable, biocompatible, and hold a great promise for prolonged delivery of
contraceptive hormones.
Keywords: Thermosensitive polymers; controlled release; contraceptive hormones.
