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Contraline, a male contraceptive company, has created a polymer solution called Echo-V that may finally lead to contraceptive equality.
Echo-V is a patent-pending, ultrasound-visible polymer solution that is injected into the vas deferens. It forms a hydrogel device that acts as a semi-permeable membrane, blocking sperm while allowing fluids through. You can think of it like a male version of an IUD, or an IVD (intra-vas device). The device does not affect hormones in any way.