Embryo Diagnostics

Embryo Diagnostics
(PGT)

A more precise and safer path
to a healthy child

Embryo diagnostics, also known as preimplantation genetic testing (PGT), is a modern and precise method that allows assessment of the genetic quality of embryos before they are transferred into the uterus. It helps increase the likelihood of a successful pregnancy and the birth of a healthy child.

During IVF treatment, not all embryos are genetically equal. Even visually high-quality embryos may carry chromosomal abnormalities that can prevent implantation or lead to miscarriage. Embryo diagnostics helps select embryos with the highest potential to develop into a healthy baby.

What is embryo diagnostics?

Embryo diagnostics involves genetic analysis of embryos during an IVF cycle before embryo transfer. The goal is to detect changes in chromosome number or structure, as well as certain genetic diseases.

The goal of Next Fertility Nordic clinic is to support patients on their journey to having a healthy child using modern, evidence-based technologies.

Types of embryo diagnostics

We offer different genetic testing methods based on patient needs:

PGT-A (aneuploidy testing)
Detects changes in chromosome number (e.g., extra or missing chromosomes, including Down syndrome risk). This is the most common type.

PGT-SR (structural rearrangement testing)
Suitable when one parent has chromosomal structural changes (e.g., translocations). Requires prior karyotype analysis.

PGT-M (monogenic disease testing)
Identifies specific genetic diseases (e.g., cystic fibrosis, Huntington’s disease).  Requires prior genetic analysis and preparation.

Modern technology to
help you start a family

When is embryo diagnostics recommended?

PGT may be beneficial in the following cases:

genetic diseases in the family
both partners are carriers of the same genetic disease
chromosomal structural abnormalities
woman’s age over 38
recurrent miscarriages
multiple failed IVF cycles
severe male infertility

PGT can also help determine the best order for embryo transfer, especially when multiple embryos are available.

How does the process work?

Embryo diagnostics is performed at the blastocyst stage (day 5-6):

4-8 cells are biopsied from the embryo under a microscope
Cells are sent for genetic analysis
Embryos are frozen until results are available
Results usually take 2–3 weeks
The doctor creates a further treatment plan

Biopsy is only performed on good-quality embryos and is generally considered safe.

How does PGT differ from standard IVF?

embryos are not transferred in the same cycle (“fresh”)
all tested embryos are frozen
transfer occurs later in a frozen embryo transfer (FET) cycle
consent form and often genetic counselling are required

Results of embryo diagnostics

Embryos may be:

euploid – normal chromosome number (suitable for transfer)
aneuploid – abnormal chromosome number (not recommended)
mosaic – mix of normal and abnormal cells
inconclusive – unreliable result
balanced / unbalanced (PGT-SR)
low risk or affected (PGT-M)

With a euploid embryo, the average live birth rate is approximately 50%, regardless of the woman’s age.

Our clinic’s IVF results

Pregnancies with euploid embryos

2023

2024

2025

Embryo Diagnostics to Support IVF Treatment

A woman’s age has a significant impact on the genetic quality of embryos. While the proportion of aneuploid embryos is approximately 30% in women under 35, it can rise to as high as 90% in women over 44. For this reason, embryo diagnostics can be especially valuable for older patients, helping them make more informed decisions during IVF treatment.

The main benefits of embryo diagnostics include a higher chance of achieving pregnancy, a lower risk of miscarriage, the possibility of selecting a genetically healthy embryo, and fewer unsuccessful embryo transfers. Modern diagnostic methods allow us to gain more information about embryos even before transfer.

However, every patient’s situation is unique. That is why we always recommend embryo diagnostics on an individual basis, taking into account your health condition, age, and previous treatment history.

If you would like to find out whether embryo diagnostics could also be suitable for you, contact us and book a consultation.

Helping to support
the birth of a healthy baby

Why choose Next Fertility Nordic?

We have years of experience in infertility treatment and belong to the Next Fertility network, which connects over 20 clinics across Europe. We offer the most modern infertility treatment in Estonia. The clinic has its own laboratory, biobank, and highly qualified specialists dedicated to providing you with the best possible treatment.

+20 IVF Clinics

8 Laboratories

9 Countries

3 Biobanks

+800 Experts

New generation clinic

Book your first visit

Frequently Asked Questions

Does embryo diagnostics affect the child’s future health in any way?

According to current knowledge, PGT (preimplantation genetic testing) does not affect the future health of the child. A few cells are taken from the outer layer of the embryo for testing, and the procedure is considered very safe in a modern laboratory setting.

How many embryos are “lost” during testing or found unsuitable for transfer after PGT?

The testing process itself does not usually harm the embryos. However, some embryos may be found genetically unsuitable for transfer after analysis. This mainly depends on the woman’s age and the quality of the embryos.

Does embryo diagnostics speed up getting pregnant or simply reduce risks?

PGT can help achieve pregnancy faster by helping select an embryo with higher implantation potential. At the same time, it also reduces the risk of miscarriage and unsuccessful embryo transfers.

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