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A prospective, randomized study to examine effectiveness of a novel micromanipulator (Venus, Vortex-like-movement-Evoked Nicking Upon Stick-site) for intra-cytoplasmic sperm injection (ICSI).

A prospective, randomized study to examine effectiveness of a novel micromanipulator (Venus, Vortex-like-movement-Evoked Nicking Upon Stick-site) for intra-cytoplasmic sperm injection (ICSI). - Examination of effectiveness of a novel micromanipulator for ICSI (Venus, Vortex-like-movement-Evoked Nicking Upon Stick-site).

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-UMIN000014600
Enrollment
30
Registered
2014-07-20
Start date
2014-07-20
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 treated by ICSI for severe male infertility or fertilization failure due to oocyte problem.

Interventions

Subjects can freely decide to participate in the trial or not, and do not have any disadvantages when they do not participate. Informed consents are obtained from all participants after they have rece

Sponsors

Women's Clinic Jinno
Lead Sponsor
Kitazato Corporation
Collaborator

Eligibility

Sex/Gender
Female

Inclusion criteria

Inclusion criteria: The study include patients who satisfy all the following criteria; (1) age = or < 39 years, (2) to undergo the first, second or third attempt of assisted reproductive technology (ART) therapy, (3) the number of retrieved oocytes are > or = 6, and (4) mainly severe male infertility (or infertility possibly due to anti-sperm antibody, hyperproduction of reactive oxygen species by sperm, or fertilization failure from oocyte factors).

Exclusion criteria

Exclusion criteria: Patients are excluded when they meet any of the following criteria; (1) diminished ovarian reserve (AMH < 2 ng/mL, day 3 FSH > 15 IU/L, or day 3 estradiol > 60 pg/mL, (2) non-obstructive azoospermia.

Design outcomes

Primary

MeasureTime frame
The rate of embryonic development per injected oocyte.

Secondary

MeasureTime frame
The number of sticks until successful injection, the rate of survived oocyte per injected oocyte, and fertilization rate.

Countries

Japan

Contacts

Public ContactMasao Jinno

Women's Clinic Jinno Reproductive Medicine

mjinno@s9.dion.ne.jp042-480-3105

Outcome results

None listed

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