<prompt> Mechanism of IUCD includes all except:Increase cervical mucusLocal foreign body like reactionDecrease diameter of fallopian tubeMake Endometrium unourable for implantation  <response>: MECHANISM OF ACTION IUDs Intrauterine device: Foreign body reaction in uterus Cellular and biochemical changes in Endometrium and uterine fluids. Impaired bility of gamete. Reduced chances of feilization. Copper ions 2nd generation Alter biochemical composition of cervical mucus. Affect sperm motilityCapacitation survival. Hormones 3rd generation in IUD Increase cervical mucus viscosity, preventing sperm from entering cervix. Sustain unorable Endometrium for implantation by maintaining high level of progesterone. 