Development of new sperm freezing method

Development of new sperm freezing method - sperm freezing method

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000031791

Enrollment

1000

Registered

2021-04-01

Start date

2016-05-12

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

Male infertility

Interventions

None listed

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: Specimen to be discarded which has a motion sperm ratio of more than 60% after treatment by density gradient centrifugation. Age; 20 years old and over. Document consent was obtained with free will of the patient himself after sufficient informed consent to participate in this research.

Exclusion criteria

Exclusion criteria: Waste specimens with an exercise rate of original semen of 30% or less. Specimens to be discarded with motion sperm ratio of less than 60% after treatment by density gradient centrifugation.

Design outcomes

Primary

Measure	Time frame
Survival rate of sperm after freezing and thawing.	—

Secondary

Measure	Time frame
Mortality, malformation rate, motility of sperm after freezing and thawing.	—

Countries

Japan

Contacts

Public ContactSeiya Higashimoto

Mie University Hosptal Center for Advanced reproductive medical

k-seisyoku@clin.medic.mie-u.ac.jp059-232-1111

Outcome results