A medical device for delivering an implant into the body of a patient for treating urinary incontinence, comprising: a first portion comprising a handle, a junction section extending distally from the handle, and a needle-receiving arm extending distally from the junction section, at least a portion of the needle-receiving arm being curved, the needle-receiving arm comprising a distal portion configured to releasably hold an end portion of the implant, the distal portion defining an opening leading to a cavity for receiving a needle comprising a plurality of retaining slots; a second portion comprising a clamping arm movably coupled to the junction section to allow an operator of the medical device to hold the handle and manually move the clamping arm with respect to the first portion, at least a portion of the clamping arm being curved, the clamping arm comprising a needle deployment mechanism for advancing the needle through tissue of the body of the patient into the cavity of the distal portion of the needle-receiving arm to allow at least some of the releasably-held implant end portion to be disposed in at least one of the plurality of retaining slots of the needle, and the needle deployment mechanism also for retracting the advanced needle out of the cavity and back through the tissue to pull the end portion of the implant through the tissue; and the needle, wherein the needle also comprises a tissue-penetrating tip, and one or more of the plurality of retaining slots are disposed distal to one or more others of the plurality of retaining slots, wherein the needle deployment mechanism of the clamping arm has a distal portion and a proximal portion and comprises a sliding component and a curved guide rail, the sliding component coupled to the needle such that movement of the sliding component translates into movement of the needle, the sliding component movably coupled to the curved guide rail to allow the operator to move the sliding component distally along the curved guide rail to advance the needle and to move the sliding component proximally along the curved guide rail to retract the needle. a first portion comprising a handle, a junction section extending distally from the handle, and a needle-receiving arm extending distally from the junction section, at least a portion of the needle-receiving arm being curved, the needle-receiving arm comprising a distal portion configured to releasably hold an end portion of the implant, the distal portion defining an opening leading to a cavity for receiving a needle comprising a plurality of retaining slots; a second portion comprising a clamping arm movably coupled to the junction section to allow an operator of the medical device to hold the handle and manually move the clamping arm with respect to the first portion, at least a portion of the clamping arm being curved, the clamping arm comprising a needle deployment mechanism for advancing the needle through tissue of the body of the patient into the cavity of the distal portion of the needle-receiving arm to allow at least some of the releasably-held implant end portion to be disposed in at least one of the plurality of retaining slots of the needle, and the needle deployment mechanism also for retracting the advanced needle out of the cavity and back through the tissue to pull the end portion of the implant through the tissue; and the needle, wherein the needle also comprises a tissue-penetrating tip, and one or more of the plurality of retaining slots are disposed distal to one or more others of the plurality of retaining slots, wherein the needle deployment mechanism of the clamping arm has a distal portion and a proximal portion and comprises a sliding component and a curved guide rail, the sliding component coupled to the needle such that movement of the sliding component translates into movement of the needle, the sliding component movably coupled to the curved guide rail to allow the operator to move the sliding component distally along the curved guide rail to advance the needle and to move the sliding component proximally along the curved guide rail to retract the needle.