which IUD increases the phagocytosis of the sperms within the uterus

Copper releasing IUDs like TCu 380A, Copper T, Multiload 375 etc release Cu ions which acts as a spermicide as it increases the  levels of prostaglandins and white blood cells within the uterine and tubal fluids , thus causing the phagocytosis of any foreign cell including sperms.

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Intra Uterine Devices (IUDs): - copper releasing IUDs (CuT, Cu7, Multiload 375) increase phagocytosis of sperms within the uterus and the Cu ions released suppress sperm motility and the fertilising capacity of sperms.
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