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Is a negative 4th-gen test at 25 weeks conclusive?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hello doctor,

I am a 28-year-old male working in a company. I am sexually active. Seven months back, I had a brief unprotected sex with a CSW (Community Sex Worker), and after which I got scared and did the following tests. Fourth generation test after 7 weeks, 12 weeks, 22 weeks, and 25 weeks. All the reports came back negative. I do not do drugs, and I have not even donated blood, technically. I have not risked myself with a CSW again.

However, I had unprotected sex with my girlfriend seven months ago once and five months ago twice. She is 100 percent HIV (Human Immunodeficiency Virus) negative. Having sex with an HIV negative person is it a possible risky exposure during the window period? Can it cause seroconversion? As per your expertise, is there anyone who had very late seroconversion?

Please help me with the details of fourth-generation test accuracy. Can HIV testing be a risk for me? I got tested in one of the famous laboratories. I am 99 percent convinced that I have no issues. However, one percent of my mind asks me to get tested again.

What do you advise me? Am I 100 percent HIV free? Do I need to get tested again? Why are these thoughts bothering me so much? I am very stressed because of this.

Please help.

Answered by Dr. Atishay Bukharia

Education:

MBBS

Professional Bio:

Dr. Atishay Bukharia is a skilled specialist in Dermatology, Venereology, and Leprosy, with expertise in treating skin, hair, and nail disorders, sexually transmitted infections, and leprosy-related conditions. He is proficient in advanced dermatological procedures, clinical diagnosis, and patient-focused care. Dr. Bukharia is committed to providing comprehensive, evidence-based treatments to promote healthy skin and improve patients' overall dermatological well-being.

This doctor is not available for online consultations on the platform anymore.

Hello,

Welcome to icliniq.com.

Let me answer your queries one by one.

No, you are talking about the case of extreme rarity, and you have tested enough to prove yourself negative. Your girlfriend has no chance of acquiring HIV. These are the most accurate tests available and detect both antigen and antibody.

No, human immunodeficiency virus (HIV) testing will not cause a risk to you. I have seen two such cases in my residency. But you do not have HIV.

Kind regards.

Medically reviewed by Dr. K. Shobana
Published At April 17, 2016
Reviewed At December 19, 2025

Education:

MBBS

Professional Bio:

Dr. Atishay Bukharia is a skilled specialist in Dermatology, Venereology, and Leprosy, with expertise in treating skin, hair, and nail disorders, sexually transmitted infections, and leprosy-related conditions. He is proficient in advanced dermatological procedures, clinical diagnosis, and patient-focused care. Dr. Bukharia is committed to providing comprehensive, evidence-based treatments to promote healthy skin and improve patients' overall dermatological well-being.

This doctor is not available for online consultations on the platform anymore.

Education:

BDS

Professional Bio:

Dr. K. Shobana is a Dental Surgeon specializing in oral health and dental care. She is skilled in preventive dentistry and provides oral hygiene education. She can do restorative treatments such as fillings and crowns. She can handle periodontal problems such as gum diseases and periodontitis. She can do root canal treatment.

This doctor is not available for online consultations on the platform anymore.

Same symptoms don't mean you have the same problem. Consult a doctor now!

Education:

MBBS

Professional Bio:

Dr. Atishay Bukharia is a skilled specialist in Dermatology, Venereology, and Leprosy, with expertise in treating skin, hair, and nail disorders, sexually transmitted infections, and leprosy-related conditions. He is proficient in advanced dermatological procedures, clinical diagnosis, and patient-focused care. Dr. Bukharia is committed to providing comprehensive, evidence-based treatments to promote healthy skin and improve patients' overall dermatological well-being.

This doctor is not available for online consultations on the platform anymore.

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