The number of days required for a DNA test depends on the type of test, the institution requesting the test and the options available.Below is a description of the number of days a typical appraisal takes.
1. Paternity test
For DNA testing to confirm parent-child relationships, the usual processing times are as follows
- Standard paternity test: 1-3 weeks
- Results are generally available within 1-3 weeks after the sample arrives, depending on the grading institute.During busy periods or when special processing is required, it may take longer.
- Express service: 3-7 days
- There is also an option to receive results in a shorter period of time for an additional fee.Express services usually provide results within three to seven days.
2. Legal paternity testing
Paternity appraisals used as legal evidence may take slightly longer due to the more rigorous procedures involved.
- Standard legal paternity test: 2-4 weeks
- Due to the rigorous sampling and testing process, it generally takes a little longer than a normal paternity test.
3. Other appraisals (e.g. sibling, grandparent and twin appraisals)
- Standard inspection: 2-4 weeks
- DNA testing other than paternity testing (e.g. sibling and grandparent testing) often takes slightly longer than paternity testing, as multiple samples are analysed.
4. genetic screening (assessment of genetic disease risk)
- Standard genetic screening: 4-6 weeks
- DNA screening to assess genetic disease risk takes a slightly longer time to produce results, as it requires a detailed analysis of several genes.
Summary
- Standard paternity test: 1-3 weeks
- Legal paternity test: 2-4 weeks
- Other appraisals (e.g. siblings, grandparents, twinning): 2-4 weeks
- Express service: 3-7 days
If the results of the appraisal are urgent, an express delivery option is available for an additional fee. When requesting an appraisal, it is important to check the laboratory’s response times and options.
略歴
- 1996年 慶應義塾大学医学部 卒業
- 2004年 慶應義塾大学 医学博士号 取得
- 2005年 慶應義塾大学 皮膚科学教室 助手
- 2008年 ヒロ皮フ形成クリニック 開業
- 2009年 医療法人社団福美会 理事長
- 2015年 医療法人社団福美会 理事
資格・所属
- CAPラボディレクター
- 日本皮膚科学会 皮膚科専門医
- 日本医師会 産業医
- 東京衛生検査所 指導監督医
この記事は、 ヒロクリニックNIPPTの編集・監修体制 にもとづき、資格を持つ医師が内容を確認しています。
堤 修一 (つつみ しゅういち)
医師・医学博士 / ヒロクリニック博多駅前院 院長
略歴
- 1993年 東京大学医学部医学科 卒業
- 2016〜2019年 東京大学先端科学技術研究センター 准教授
発信・関連リンク
この記事は、 ヒロクリニックNIPPTの編集・監修体制 にもとづき、資格を持つ医師が内容を確認しています。
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Supervisor of the article

Dr. Hiroshi Oka
Graduated from Keio University, Faculty of Medicine
Doctor of Medicine
Medical Doctor




