Intrauterine contraceptive device

1. An intrauterine contraceptive device comprising a carrier body and an active metallic alloy, characterized in that the active metallic alloy is of the formula

Zn x Cu y Mn z Au k   (I), or

Zn x Cu y Mn z Ag k   (II),

wherein

x+y+z+k=100 weight %,

x is in the range from approximately 18 to 30 weight %,

z is in the range from approximately 0.5 to 3 weight %,

k is in the range from approximately 3 to 12 weight %, and

y being the balance.

2. The intrauterine contraceptive device of claim 1 , wherein x+y is approximately 93 weight %.

3. The intrauterine contraceptive device of claim 1 , wherein the carrier body is equipped with arms on one side and an indicator thread on the opposite side of the body.

4. The intrauterine contraceptive device of claim 1 , wherein the carrier body is made of plastic.

5. The intrauterine contraceptive device of claim 4 , wherein the plastic is polyethylene.

6. The intrauterine contraceptive device of claim 3 , wherein the indicator thread is a monofilament polyester thread.

7. The intrauterine contraceptive device of claim 1 , wherein the active metallic alloy is wire-shaped.

8. The intrauterine contraceptive device of claim 7 , wherein the active metal alloy is placed onto the carrier body in a helical form.

9. A method of performing a spermicide function on spermatozoa which comprises using of a metallic alloy having the formula

Zn x Cu y Mn z Au k   (I), or

Zn x Cu y Mn z Ag k   (II),

wherein x+y+z+k=100 weight %, x is in the range from approximately 18 to 30 weight %, z is in the range from approximately 0.5 to 3 weight %, k is in the range from approximately 3 to 12 weight %, and y being the balance, in an intrauterine contraceptive device.