What are type 1, 2, and 3 embryos?

This article is professionally consulted by Master, Doctor Nguyen Thi Cam Van - IVF Lab Doctor - Reproductive Support Center - Vinmec Times City International Hospital.

Evaluation of embryo quality is very important to increase the chances of success of IVF. When assessing the quality of embryos, people often divide them into type 1, 2, and 3 embryos.

In vitro fertilization (IVF) is a widely used treatment for infertility. The most important steps of IVF are removing the sperm and egg from the body, creating an embryo. These embryos are cultured for a few days in a laboratory and then transferred back to the mother's uterus for the embryo to implant and develop into a baby.
When doing IVF, doctors will use ovarian stimulation drugs to get many follicles (instead of 1 follicle as in the natural cycle). Therefore, each cycle of IVF treatment, the patient can get many eggs and from there have many embryos for analysis, evaluation, and classification of embryos into groups.
During the culturing process, the doctor will observe the embryo's development and evaluate the quality at 3 days and 5 days old. The evaluation of embryo quality is mainly based on morphology. And depending on the stage, there will be specific criteria for classifying embryos. With day 3 embryos, the assessment is based on the number, cell size, and fragmentation of the embryo. Beautiful embryos on day 3 should have about 7-8 cells, the same size, no fragmentation.
With day 5 embryos, embryo quality will be evaluated based on 3 factors: bud cell mass morphology, trophoblast cell mass morphology and blastocyst cavity size. A good blastocyst is an embryo with an enlarged blastocyst cavity, a well-defined bud cell mass, consisting of many compacted cells, and a trophoblast cell mass consisting of many closely interconnected cells.

Through the evaluation results of embryos, doctors will classify embryos into groups of type 1, type 2 or type 3. From there, the couple is doing IVF to make a decision together: Order priority for embryo transfer , should culture extend to blastocyst stage (embryo day 5) or not, how many embryos should be transferred or frozen,...
What is type 1 embryo? Type 1 embryos are the best, most likely to succeed. Type 2 embryos are average and grade 3 embryos are of lower quality, with a low or unsuccessful success rate (depending on the individual patient). However, the quality of embryos is not too different, so couples should not worry too much in the case of only type 2 or type 3 embryos without type 1 embryos.

Based on the results of the analysis and assessment of the quality of embryos of types 1, 2, and 3, the doctor and patient will discuss to come up with a plan to transfer embryos with the right quantity and quality to have a high success rate. best.
Customers can come to the Center for Reproductive Support - Vinmec International General Hospital. This is the leading center in Vietnam, which has developed and applied a comprehensive medical examination and treatment process, combining both gynecology and obstetrics and gynecology to provide the optimal method for each patient's case.
Advantages when customers choose Vinmec fertility center:
Equipped with modern equipment, clean air system according to international standards to ensure lab quality, single cabinet system to optimize quality embryo, improving the success rate for each cycle of artificial insemination. Implement most advanced assisted reproductive techniques in the world: ICSI (injection of sperm into the oocyte cytoplasm); support embryo escape membrane; Reproductive reserve: embryo freezing, sperm freezing, oocyte freezing to help customers take the initiative in giving birth at will, transferring embryos on day 5, minimizing pregnancy; male infertility techniques (PESA, MESA, TEFNA, TESE) Besides advanced reproductive support methods, a team of excellent doctors in the country and the world, with prestige and long-term experience in the field of infertility . Any questions that need to be answered by a specialist doctor as well as customers wishing to be examined and treated at Vinmec International General Hospital, please register for an online examination on the Website for the best service.