Prospective, randomized, controlled study to evaluate safety and effectiveness of a newly designed needle with a thin tip on the oocyte retrieval

Prospective, randomized, controlled study to evaluate safety and effectiveness of a newly designed needle with a thin tip on the oocyte retrieval - Study to evaluate safety and effectiveness of a newly designed needle with a thin tip on the oocyte retrieval

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000014800

Enrollment

100

Registered

2014-08-09

Start date

2013-05-01

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Infertility

Interventions

Needle A: a reduced needle with lure connection with a 17 gauge body but a 20 gauge tip Needle B:a standard 19 gauge needle

Eligibility

Sex/Gender

Female

Inclusion criteria

Inclusion criteria: Patients undergoing oocyte retrieval for IVF treatment at the clinic

Exclusion criteria

Exclusion criteria: Patients are not eligible for inclusion in the study if they have: 1. Previously participated in the study 2. A body mass index (BMI) >35 3. Known endometriosis 4. Other contraindications for oocyte aspiration 5. Two or more of developed follicle number

Design outcomes

Primary

Measure	Time frame
The primary endpoints are the rating of pain using Visual Analogue Scale ranging 0 to 10 points and frequency of bleeding. The condition that bleeding did not cease after making direct compression for 30 seconds was defined as bleeding.	—

Secondary

Measure	Time frame
1. Operation time (second) 2. Oocyte recovery rate (%) 3. Fertilization rate (%) 4. Morphological good embryo rate (%) 5. Clinical pregnancy rate (%)	—

Countries

Japan

Contacts

Public ContactKoji Nakagawa

Sugiyama Clinic Division of Reproductive Medicine

nakagawa-jiko@spice.ocn.ne.jp03-5454-8181

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026