Nowadays, Frozen Embryo Transfer or FET is suggested for IVF/ICSI treatment as providing more pregnancy rate than FRESH embryo transfer.

What is the difference between FRESH VS FET?

- FRESH embryo transfer is the process of embryo transplantation into the uterus after the process of fertilization (IVF/ICSI) for 3 – 6 days.
- Frozen Embryo Transfer (FET) is the process of embryo transplantation into the uterus after thawing frozen embryo. The patient can choose FET date by convenient time e.g. 3-4 months after the oocyte collection date.

Why FET provides more success rate?

Most of medications in the ovarian stimulation process are female hormone such as Luteinizing Hormone (LH) and Follicle Stimulating Hormone (FSH) for activating the oocyte. In between stimulation process, not only hormones are rising but also lead to the Ovarian Hyperstimulation (OHSS).
OHSS is the situation that the ovaries are too affected than the natural cycle. If the patient make decision to transfer embryo after the ovarian stimulation process (FRESH cycle), they may experience edema, flatulence, hard breathing, acute renal failure and lethal effect.

In the process of the ovarian stimulation also related to the endometrial thickness. Some of the patient experience bloated endometrium and this also affect to the embryo implantation.
Frozen Embryo Transfer (FET) is the better suggestion, since the patient can keep their embryo(s) as freezing and come back for embryo transfer after recovering themselves.

If in doubt For more information, please contact SIAM FERTILITY CLINIC at “contact”



Hysteroscopy is a procedure that allows a doctor to look inside the uterus in order to diagnose and treat causes of abnormal bleeding. The procedure can be either diagnostic or operative.


IVF refers to a technique of assisted reproduction where the egg and sperm are fertilized outside of the body to form an embryo. This embryo is then transferred to the uterus to implant and become a pregnancy.

EmbryoScope Plus

In the field of IVF, one of the biggest challenges is to select the embryo most likely to result in the birth of a healthy baby.

Operated by an expert infertility treatment with more than a decade of experience.


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