A procedure where embryo transfer is not performed in the oocyte retrieval cycle but later.

A procedure where embryo transfer is not performed in the oocyte retrieval cycle but later.

• A. Fresh embryo transfer
• B. Natural cycle transfer
• C. Day-3 transfer
• D. Delayed embryo transfer

Answer: (D)

The main idea is timing of embryo transfer in relation to oocyte retrieval. Delayed embryo transfer means embryos are not transferred in the same cycle as egg retrieval. Instead, the embryos are cryopreserved and transferred in a later cycle, often in a different hormonal environment. This approach, commonly called a frozen embryo transfer (FET), lets the uterus be prepared separately and can offer benefits like improved endometrial receptivity and reduced risk of ovarian hyperstimulation syndrome. In contrast, a fresh embryo transfer happens in the retrieval cycle, a natural cycle transfer occurs without ovarian stimulation in the transfer cycle, and a Day-3 transfer refers to the embryo’s development stage at transfer rather than the timing relative to retrieval.

The main idea is timing of embryo transfer in relation to oocyte retrieval. Delayed embryo transfer means embryos are not transferred in the same cycle as egg retrieval. Instead, the embryos are cryopreserved and transferred in a later cycle, often in a different hormonal environment. This approach, commonly called a frozen embryo transfer (FET), lets the uterus be prepared separately and can offer benefits like improved endometrial receptivity and reduced risk of ovarian hyperstimulation syndrome. In contrast, a fresh embryo transfer happens in the retrieval cycle, a natural cycle transfer occurs without ovarian stimulation in the transfer cycle, and a Day-3 transfer refers to the embryo’s development stage at transfer rather than the timing relative to retrieval.