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検査という安心を選べるのはヒロクリニック
ヒロクリニックが選ばれる理由 ヒロクリニックが選ばれる理由 ヒロクリニックが選ばれる理由
ヒロクリニックならたとえ陽性になっても最後までフォローアップ
ヒロクリニックと一般産婦人科のNIPT比較
NIPT・クアトロ検査・エコー検査 比較表

Dr. Hiroshi Oka

From Okayama Prefecture
Chief Director, Hiro Clinic (Medical Corp. Fukumikai) / Lab Director

After graduating from Keio University School of Medicine, Dr. Oka passed medical licensing examinations in both Japan and the United States. Following clinical training, he obtained his PhD in Medicine in just two years.
He serves as a visiting professor at a professional university and plays an active role as a Medical PhD at a clinic specializing in NIPT. He holds the rare Lab Director qualification, possessed by only about 20 people in Japan.
Concerned by the current situation where NIPT in Japan faces various restrictions that often prevent users from receiving necessary testing, he established his own laboratory with the mission of providing the world’s highest standard of NIPT.

Hiro Clinic NIPT
5 Reasons for Peace of Mind

  • 1Comprehensive Medical Support
  • Collaborative care by specialists in Obstetrics/Gynecology, Pediatrics, and Clinical Genetics.
    Addressing questions and anxieties from multifaceted perspectives.
    Networked clinics ensure smooth collaboration between specialists.
  • Read more
  • 2Wide Range of Testing Options
  • Basic Trisomy testing for chromosomes 13, 18, and 21.
    Whole chromosome aneuploidy testing (1-22 and sex chromosomes).
    Microdeletion syndrome detection (4 types).
    Whole autosomal partial deletion/duplication disorders (54+ types).
    Detection of 228 single-gene disorders.
    Testing available for twin pregnancies.
  • Read more
  • 3Latest Genome Analysis Technology
  • Exclusive domestic partnership with Medicover Genetics, a world leader in genetic testing.
    Realizing advanced testing as a pioneer in Japan.
    First in Japan to introduce the “VeriSeq NIPT Solution V2” system.
  • Read more
  • 4Proprietary Positive Score Report
  • Analysis of data from over 50,000 pregnant women in Japan.
    Free provision of “Positive Score” and “Positive Predictive Value” in case of positive results.
    Accurate information based on data specific to Japanese demographics.
  • Read more
  • 5Comprehensive Follow-up Support
  • Amniocentesis Support: Subsidy of up to 200,000 yen in case of a positive result.
    Applicable even for amniocentesis performed at medical institutions other than Hiro Clinic.
    Referrals to medical institutions capable of performing amniocentesis are also available.
  • Read more

Hiro Clinic NIPT Philosophy

Respect for the “Right to Know”
We respect the “right to know” of pregnant women and their families so that they can approach childbirth with peace of mind and good health.
Promoting Correct Understanding of NIPT
We aim to promote the widespread understanding that NIPT (Non-Invasive Prenatal Testing) is not just for determining fetal health status, but also contributes to maintaining maternal health.
IT × Medical Care
Through the utilization of IT, we improve convenience for patients, enhance testing accuracy, and ensure rapid response times.

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NIPT and Pregnancy Useful Columns

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Concerns About Having a Child
with an Intellectual Disability

It is only natural for parents to feel anxious about the future of a child with an intellectual disability.

“Will this child be able to work when they grow up?”
“How will they survive after we, the parents, are gone?”
These are thoughts and concerns we face with patients every day.

How common are these intellectual disabilities?
Detailed information on intellectual disabilities can be found on other pages of this site, but the conclusion is that not all intellectual disabilities can be detected by NIPT.
This is because intellectual disabilities often occur independently of genetics. However, it is a natural parental instinct to want to exclude that possibility as much as possible before birth.
Is it possible to detect intellectual disabilities with the three types of NIPT tests (Chromosomes 13, 18, and 21) performed at most facilities? Only the test for Chromosome 21 (Down syndrome) targets intellectual disability. For Trisomy 13 and 18, the physical disabilities are so severe that it is difficult to even recognize the intellectual disability. In other words, the condition is so severe that the child often passes away too early to determine if an intellectual disability exists.

However, isn’t what parents worry about most the scenario where the child grows physically but remains intellectually disabled?
If this can be known prenatally, it is parental love to want to detect as many conditions as possible. Let us consider in what cases intellectual disabilities occur.
In the case of Trisomy 13 and 18 mentioned earlier, the reason intellectual disability is not the sole focus is that these chromosomes carry so many vital genes that cases presenting only intellectual disability are rare. Since many genes related to life support are also present, sustaining life becomes difficult before intellectual disability even becomes an issue. So, what happens if there is an abnormality in the number or sequence of some genes? While life can be sustained, it often involves impairment of the brain, a highly advanced function, resulting in intellectual disability.
NIPT is basically a test to check the “quantity” of chromosomes. Since it cannot check for sequence abnormalities, NIPT can only detect partial changes in chromosomal quantity. However, among genetic abnormalities, quantity abnormalities are more common than sequence abnormalities. Therefore, NIPT is very useful because it can check for these quantity abnormalities.

So, how can we test for such intellectual disabilities?

First, those who have seen this website may have realized that there are multiple options for NIPT. That means there are tests other than the 13, 18, and 21 chromosome tests recommended by obstetricians. These “other tests” are widely performed around the world. Particularly famous are sex chromosome abnormalities. Microdeletion syndromes, involving the loss of a small part of a chromosome, are also well-known conditions. This is because DiGeorge syndrome, which is included in this category, is said to be the second most common cause of intellectual disability. It follows Down syndrome in frequency. The average life expectancy is said to be around 50 years. As mentioned earlier, since only a part of the chromosome is missing, life can be sustained, and with current medical care, patients can live into their 50s or 60s. However, their intelligence is around IQ 50, which makes it difficult to live independently. Also, sex chromosome abnormalities are associated with infertility and growth disorders. Knowing this early allows for the prevention of growth disorders, and if the individual knows they have a high probability of infertility, they can access advanced medical procedures such as TESE. Regarding sex chromosome abnormalities, even if they do not reach the level of intellectual disability, they are commonly accompanied by learning disabilities. Detailed information on these topics is written on each page, so please take a look.

What I want to say here is that NIPT is not limited to just three types. Nowadays, various tests are available, making it possible to detect conditions involving intellectual and developmental disabilities early on, many of which are completely untreatable. I harbor a certain anxiety about the fact that NIPT is gradually spreading without these facts being fully conveyed to pregnant women.

More details are written on this website, so please read through it. If the text alone is difficult to understand, we provide YouTube videos every day. Please refer to those as well.

What is the difference between Hiro Clinic and other clinics (including certified facilities)?

The main differences between Hiro Clinic and other clinics (primarily facilities certified by the Japanese Association of Medical Sciences) lie in the “freedom of testing scope” and “accessibility.”
First, regarding testing items: certified facilities are generally limited to three types: Trisomy 21, 18, and 13. In contrast, Hiro Clinic offers a wide range of options, including testing for all chromosomes, microdeletions, and gender determination.
Conditions for consultation also differ. Certified facilities may have age restrictions (e.g., “35 years or older”) or require a referral letter. Hiro Clinic has no age limit and accepts patients as early as 6 weeks of pregnancy. Additionally, our partnership with domestic laboratories allows for speedy results in as little as 2 days, and costs starting from the 50,000 yen range are significant advantages.
On the other hand, certified facilities require mandatory, in-depth face-to-face genetic counseling, offering a sense of security through strict management protocols. Please check the comparison page on the Hiro Clinic official website to choose the option that best suits your needs.

What conditions can be detected?

Hiro Clinic specializes primarily in NIPT (Non-Invasive Prenatal Testing). This test allows us to screen for chromosomal abnormalities in the fetus with high accuracy using the mother’s blood.
Specifically, the following can be determined: First, the likelihood of major chromosomal disorders such as Trisomy 21 (Down syndrome), Trisomy 18, and Trisomy 13. Furthermore, depending on the chosen plan, comprehensive testing is available for all autosomal chromosomes (1 to 22) and for “Microdeletion Syndromes,” where part of a chromosome is missing. In addition, abnormalities in sex chromosomes and the gender of the baby can also be determined.
We operate in multiple locations across Japan, have no age limit, and accept patients from early pregnancy (6 weeks onwards) as long as the pregnancy is confirmed by ultrasound. For details, please check the Hiro Clinic official website.

What should I do if the result is positive? Is there a fee for amniocentesis?

If the NIPT result at Hiro Clinic is positive, it is recommended to undergo an “amniocentesis” to confirm the diagnosis.
Amniocentesis typically costs around 100,000 to 200,000 yen. However, Hiro Clinic offers a unique “Amniocentesis Support (Mutual Aid)” system. By paying a membership fee of 3,000 yen (excluding tax) at the time of NIPT testing, you can receive a subsidy of up to 200,000 yen for testing costs in the unlikely event of a positive result. This system is applicable even if the amniocentesis is performed at another medical institution.
Support after a positive result is also comprehensive. We provide a free report (excluding some plans) that quantifies the positive predictive value using our proprietary “Positive Score,” which can help you decide whether to proceed with amniocentesis. You can also consult with specialized doctors and genetic counselors, ensuring a support system that allows you to calmly consider your next steps.
Please check Hiro Clinic’s post-positive aftercare page for details.

Why is the testing so fast? Is there a difference in accuracy?

The main reason Hiro Clinic’s testing is fast is that we have a testing laboratory within our own group in Japan.
Many medical institutions ship collected samples to overseas testing facilities, taking about 1 to 2 weeks for results. Hiro Clinic, however, completes testing domestically and improves efficiency by introducing automated pipetting machines and the latest next-generation sequencers, achieving speedy notification in as little as 2 to 3 days.
Regarding accuracy, it compares favorably with other hospitals and certified facilities. The accuracy of NIPT itself is extremely high, with a negative predictive value reaching 99.99%. Hiro Clinic uses systems from globally trusted companies like Illumina, and rapid domestic testing minimizes the risk of sample degradation. Speed does not compromise accuracy; rather, by actively adopting new technologies, we maintain high reliability.

What is the probability of requiring a retest due to insufficient fetal DNA?

At Hiro Clinic, the probability of an “indeterminate result” (where no result is obtained due to insufficient fetal DNA, etc.) requiring a retest is very low, estimated at about 0.3% to 0.4%.
Hiro Clinic’s NIPT boasts a very high “result reporting rate,” with data showing that 99.98% of people receive a result. The main cause of an indeterminate result is that the amount of fetal DNA in the mother’s blood (Fetal Fraction: FF) does not meet the standard. This can happen especially if the pregnancy is very early, or depending on the mother’s weight or constitution. In such cases, by waiting 1 to 2 weeks and redrawing blood, a correct determination is possible in over 85% of cases.
In the unlikely event that a result cannot be determined even after a retest, we will consult with you and a doctor regarding future steps (such as proceeding to amniocentesis) depending on the situation. Details can be found on Hiro Clinic’s explanation page regarding indeterminate results.

Can I take the test if my pregnancy is very early or late?

At Hiro Clinic, it is possible to take the NIPT test even if the pregnancy weeks are considered “too early” or “too late” by general standards.
Regarding “too early” cases: while standard clinics typically accept patients from 10 weeks of pregnancy, Hiro Clinic accepts patients from 6 weeks if the fetal heartbeat can be confirmed by ultrasound. Testing early offers the significant advantage of securing ample time for detailed examinations and decision-making in the unlikely event of a positive result.
Regarding “too late” cases: there is no upper limit on the weeks for consultation. We respond flexibly to “Late NIPT” after 15 or 18 weeks, allowing those who develop anxiety late in pregnancy to be tested.
However, since there are legal restrictions and medical deadlines for amniocentesis (which provides a definitive diagnosis for positive results), it is recommended to take the test with time to spare, ideally by around 14 weeks.

Which should I take first: Fetal Dock (Ultrasound) or NIPT?

When considering both NIPT and a Fetal Dock (detailed ultrasound examination), Hiro Clinic basically recommends “taking NIPT first.”
NIPT can be done with just a blood draw and determines the possibility of chromosomal abnormalities with extremely high accuracy. It is medically rational to first check the overall risk with NIPT; if negative, you can return to regular prenatal checkups with peace of mind. If the result is positive or indeterminate, proceeding to a Fetal Dock or amniocentesis is the logical next step.
While there are cases where NIPT is taken after an abnormality is pointed out in a Fetal Dock, checking details with a specialized ultrasound based on NIPT results is considered more efficient for diagnosis and reduces the mental burden on the pregnant woman.
As of 2026, our clinic also offers plans combining NIPT and ultrasound examinations.
Please consult a doctor regarding the optimal timing for testing.

Please tell me about payment methods and the time required.

Here is information regarding our payment methods and the time required on the day of your visit.
【Payment Methods】
As of 2026, we have introduced a variety of payment methods for patient convenience. In addition to cash, major credit cards (VISA, Mastercard, JCB, American Express, Diners, etc.) are accepted. We also support various QR code payments and electronic money, so please choose the method that suits you best.
【Time Required on the Day】
The time from arrival to departure is typically very smooth, taking about 30 minutes to 1 hour. Since it is by appointment, waiting time is minimal. The flow consists of filling out a questionnaire, counseling by a doctor, and blood sampling. We have established a system that allows you to visit without difficulty even during work breaks or childcare.