In an TEC cycle, the most important step is endometrial preparation, which will make the uterus more receptive to implantation.

The protocol for this phase is adapted to each patient and can be performed in a natural cycle, in a cycle with mild ovulation stimulation, or in a cycle with replacement therapy.

Types of stimulation:

- Natural cycle: the woman's natural cycle is used to the fullest extent, and it may be necessary to use injectable medication to trigger ovulation and oral/vaginal medication to prepare the endometrium;

- Cycle with ovulation stimulation: oral or injectable medication may be used to stimulate ovulation, and an injectable medication may also be administered to trigger ovulation, followed by medication for endometrial preparation;

- Cycle with replacement therapy: use of medication that will mimic a natural cycle. It consists fundamentally of the ingestion of estrogens orally. When the endometrium reaches the desired thickness, progesterone is ingested vaginally.

In all these types of cycles, ultrasounds are performed to monitor the development of the endometrium, allowing for the selection of the best day for the transfer.

The embryo(s) is/are thawed in a way that coordinates the embryonic development stage with the development of the endometrium. In most cases, the embryos are cryopreserved at the blastocyst stage, and thawing is performed on the same day as the transfer.

FET (Frozen Embryo Transfer) is a simple and painless procedure in which a maximum of two embryos are placed inside the uterus using a thin, flexible catheter.

A pregnancy test detecting the beta-hCG hormone is performed 12 days after the transfer date. Throughout the entire process, it is essential that you follow the prescribed medication plan and all recommendations provided by your doctor.