Abstract: An instrument to prepare and safely place an intra-uterine device in uterus of a woman, comprising a dynamic stopper, a string management arrangement whereby a string of an IUD is in one of a locked condition or an unlocked condition, an operating device, further comprising a base, a cover a carriage, wherein the dynamic stopper slidably resides in the base and can slide by the sliding length, wherein the string exits from an outpoint and re-enters from an inpoint, the outpoint is at a trim length and the inpoint is at a conservative length. The string can be trimmed as per sounding measurement of uterus of woman, before inserting the instrument in uterus and string entanglement possibilities are eliminated, irrespective of type of IUD.

Abstract: An instrument (10) to prepare and safely place an intra-uterine device (30) in uterus (50) of a woman, comprising a dynamic stopper (20), a string management arrangement (110) whereby a string (31) of an IUD (30) is in one of a locked condition or an unlocked condition, an operating device (100), further comprising a base (70), a cover (90) a carriage (140), wherein the dynamic stopper (20) slidably resides in the base (70) and can slide by the sliding length (23), wherein the string (31) exits from an outpoint (87) and re-enters from an inpoint (88), the outpoint (87) is at a trim length (46) and the inpoint (88) is at a conservative length (47). The string (31) can be trimmed as per sounding measurement of uterus (50) of woman, before inserting the instrument (10) in uterus (50) and string (31) entanglement possibilities are eliminated, irrespective of type of IUD (30, 30A, 30B).

Abstract: An intrauterine device (IUD) with a restricted movement of a string(s), the strings can be either a single string or two or more strings or a filament, emerging from the spherical bulge of IUD. The strings of IUD are of a differential strength so that the strings are soft and the hanging portion of the strings, “feelable” in the vaginal cavity, does not cause discomfort to the woman, nor bruise the organ of the partner during intercourse, at the same time the strings in the endocervical canal are relatively stiffer and not have the tendency to get curled up progressively. The strings optionally have marks to facilitate cutting by a surgeon to an accurate length.

Abstract: An intrauterine device (20) with a restricted movement of a knot (5) of the string (4) due to a region (3) having such differed shape and size at a distal end (12) of central vertical stem (1) and due to a trajectory for string (4) in the region (3) that the length of the string (S) is shorter than the distance (r) of the region (3); and the loop (15) of the string and therefore the knot (5) is unable to pivot around the axis (14) . The lateral shift of the knot (5) is also prevented. Consequent to restricted pivoting and restricted lateral shift of the knot (5), the hanging portion (9) of the string (4) continue to project downwards and do NOT develop tendency to get retracted and thus do not curl up in the uterus (16) through the cervix (17).

Abstract: An intrauterine device (IUD) with a restricted movement of a string(s), the strings can be either a single string or two or more strings or a filament, emerging from the spherical bulge of IUD. The strings of IUD are of a differential strength so that the strings are soft and the hanging portion of the strings, “feelable” in the vaginal cavity, does not cause discomfort to the woman, nor bruise the organ of the partner during intercourse, at the same time the strings in the endocervical canal are relatively stiffer and not have the tendency to get curled up progressively. The strings optionally have marks to facilitate cutting by a surgeon to an accurate length.

Abstract: An intrauterine device (20) with a restricted movement of a knot (5) of the string (4) due to a region (3) having such differed shape and size at a distal end (12) of central vertical stem (1) and due to a trajectory for string (4) in the region (3) that the length of the string (S) is shorter than the distance (r) of the region (3); and the loop (15) of the string and therefore the knot (5) is unable to pivot around the axis (14). The lateral shift of the knot (5) is also prevented. Consequent to restricted pivoting and restricted lateral shift of the knot (5), the hanging portion (9) of the string (4) continue to project downwards and do NOT develop tendency to get retracted and thus do not curl up in the uterus (16) through the cervix (17).