{"id":4489,"date":"2025-08-07T07:19:10","date_gmt":"2025-08-07T05:19:10","guid":{"rendered":"https:\/\/myivfbuddy.com\/?p=4489"},"modified":"2026-04-11T15:46:54","modified_gmt":"2026-04-11T13:46:54","slug":"failed-fet-understanding-what-went-wrong-and-the-next-steps","status":"publish","type":"post","link":"https:\/\/myivfbuddy.com\/es_es\/failed-fet-understanding-what-went-wrong-and-the-next-steps\/","title":{"rendered":"Comprensi\u00f3n de los ciclos fallidos de transferencia de embriones congelados (FET) y c\u00f3mo seguir adelante"},"content":{"rendered":"
\n\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

A failed frozen embryo transfer (FET) cycle can feel like a crushing blow. After months of preparation, emotional ups and downs, and getting through the two-week wait, the disappointment of seeing that negative pregnancy test can be overwhelming.<\/p>

We know how incredibly tough it can be, and it\u2019s understandable to feel heartbroken, disappointed, and unsure of what comes next. Understanding why it happened and how to move forward can give you the strength to keep going.<\/p>

In this post, we\u2019ll explore some common reasons why FETs fail and provide guidance on the next steps you can take to help increase your chances of success in future FET and IVF cycles, and reduce the risk of failed IVF cycles.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"Understanding\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Why Do FET Cycles Fail?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Before diving into the next steps, it\u2019s crucial to understand the reasons behind a failed FET cycle. While every situation is unique, there are common factors that could contribute to IVF implantation failure.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Embryo Quality<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

The health of your embryo plays a significant role in the success of FET. Sometimes perfectly graded embryos have hidden genetic issues such as chromosomal abnormalities that prevent them from implanting in the uterus. Was your embryo PGT-A tested? Preimplantation genetic testing (PGT-A) can help identify such issues early, allowing you to transfer healthy, genetically tested embryos.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Uterine Conditions<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Now that we’ve covered the embryo, let’s consider the condition of the uterus. For implantation to occur, your uterus must be ready to support the embryo. Conditions such as a thin endometrial lining, fibroids, or polyps can make it harder for the embryo to implant, sometimes leading to failed FET cycles.\u00a0<\/p>

To ensure your uterus is properly prepared, tests like ImMap\u00ae (assessing your uterus immunology) and ERMap\u00ae (assessing your endometrial receptivity) can help evaluate whether your lining is ready for implantation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Sperm Quality<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

It\u2019s also important to remember sperm quality. Though it\u2019s less often the primary cause of failure, abnormal sperm can lead to fertilisation issues or genetic problems in embryos, making them less likely to implant. If sperm quality is a concern, checking for DNA fragmentation as well as treatments like ICSI (intracytoplasmic sperm injection) or using donor sperm may be worth considering.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Endometriosis <\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Another potential reason for a failed FET could be Endometriosis – an invasive disease that causes chronic and debilitating pain and is estimated to be a contributing factor in 30-50% of infertility cases.<\/p>

Tissue that is similar to the lining of the uterus grows inside the pelvic cavity and beyond, causing inflammation and oxidative stress which can affect the ovaries, uterine lining and egg quality, thereby lowering the chances of successful implantation.<\/p>

In some cases, symptoms can go unnoticed and endometriosis is only discovered when investigating potential causes of infertility. A laparoscopy is the only way to make a 100% confirmed diagnosis and can often support the IVF process by enabling the doctor to identify and remove any cysts or scare tissue creating a better environment to support embryo implantation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Immune Rejection <\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

A strong, balanced immune system is critical in pregnancy as it helps the uterus accept and nurture the embryo. The immune system is responsible for triggering certain blood vessels necessary for creating and growing the placenta to facilitate the healthy development of your baby. A weakened immune system can not only increase the risk for infection and disease but may also contribute to the inability to support a pregnancy. Autoimmune disorders and the presence of antibodies in the mother\u2019s blood can cause implantation failures, repeat miscarriages, delayed foetal growth, and placental insufficiency. If you have been trying to conceive for a long time and are experiencing infertility or recurrent miscarriages here are some tests that you could discuss with your doctor:<\/p>