The eggs developed in standard IVF treatment are collected, mature eggs are fertilized with sperm, then the developing embryos are placed in the uterus on the 3rd or 5th day and this is called fresh embryo transfer.
During this treatment, many ovos develop with ovo stimulating injections and E2 hormone levels in the blood reach very high values. This hormone provides the development of the inner layer of the uterus called the endometrium and thus the embryos can settle into the uterus. However, it has been claimed that high levels of hormone levels in the standard IVF treatment may have an adverse effect on the endometrium which is the inner layer of the uterus and decrease the success of pregnancy. Therefore, it is thought that the chance of pregnancy can be increased by transferring frozen embryos after waiting about 2 months and instead of transferring the good quality embryos which are developed for normalization of the effects of the drugs from the body, the ovaries and these high hormone levels return to normal. This is called Frozen Embryo Transfer (FET). In our clinic, we apply this method especially in our young patients with many ovos. One of the main advantages of this method is that there is no side effect called OHSS due to overstimulation of the ovaries. While OHSS was one of the most feared and extremely severe complications of IVF treatments, it is no longer seen with uterine resting method.
For the last 5 years, we have been evaluating each patient separately and we have been trying to determine which method our patient can get better according to the developments and apply that method. In this method, ovo and embryo development, patient age, uterine internal development according to criteria such as the individual test is one of the methods we recommend to our patients.
This method is also applied to patients receiving cancer treatment before chemotherapy or radiotherapy. Again, preimplantation is applied in Genetically Tested IVF Therapies where genetic diagnosis is applied and the best quality embryos are kept frozen until the genetic test results are obtained.