Mexico Surrogacy Explains the Mystery of Killer Cells Behind Infertility

In real life, many couples have normal medical test results yet still fail to conceive after years of trying. As reproductive medicine advances, it has become clear that infertility is not caused only by hormones or structural issues. Another often overlooked factor that can affect conception success is immune system imbalance.

What is killer cell immune infertility

So-called killer cells, medically known as NK cells, are an essential part of the human immune system and are originally responsible for eliminating viruses and abnormal cells. However, in some individuals, these cells become abnormally active and may recognize an embryo as a foreign body, thereby attacking or interfering with implantation and development. When this immune response occurs during pregnancy preparation or embryo transfer, it can lead to repeated implantation failure or early miscarriage, a condition known as immune infertility.

Why it is often overlooked

Immune factors are not as easily detected in routine tests as blocked fallopian tubes or hormone abnormalities. Many people only undergo specialized immune testing after multiple failed attempts and only then discover the underlying cause. Especially when standard baseline examinations appear normal yet pregnancy still does not occur or transfers repeatedly fail, physicians may then consider immune evaluation. For this reason, such infertility is often not difficult to treat but simply identified late.

When immune factors should be suspected

Clinical experience shows that doctors usually recommend further immune testing under certain circumstances, including many years of unexplained infertility, multiple failed embryo transfers, recurrent early miscarriages, or a history of autoimmune disease. These signs do not necessarily confirm immune infertility, but they indicate the need for deeper investigation so that repeated attempts are not made without addressing the real issue.

How medicine responds to immune abnormalities

With advances in reproductive medicine, several interventions are now available for abnormal NK cell activity, such as immune modulation therapy, individualized medication plans, and optimized transfer timing. The key is not a single treatment but a comprehensive strategy based on systematic evaluation. In Mexico surrogacy and international assisted reproduction systems, physicians often assess hormone levels, uterine environment, embryo quality, and immune indicators together to improve overall success rates rather than focusing on only one parameter.

When medical decisions are built on complete data and clinical experience, many infertility cases that once seemed unexplained can actually be clarified. Professional pathways centered on Mexico surrogacy and immune evaluation are therefore becoming a rational choice for many families.

Located in the vibrant center of Mexico City, Power Fertility Clinic is a fully licensed reproductive center operated by a US-based fertility organization, just 500 meters from the US Embassy and compliant with FDA standards. Power IVF offers comprehensive services from egg and sperm donation to third-party reproduction, covering the full process of US egg freezing and US IVF. The clinic is equipped with advanced technology and an experienced team, specializing in IVF-PGT (PGT-A) to help families achieve healthier pregnancies. Mexican law supports gender selection and the import of frozen reproductive tissues including sperm, eggs, and embryos, and is open to all individuals, including single parents and LGBTQ families. Power IVF is licensed to receive frozen samples from overseas, ensuring that your fertility plans remain safe and secure.