What are the conditions for transferring fresh embryos?
Apr 25, 2023
Source: Cainiu Health
Dr. Lv Aiming
Introduction
Conditions for fresh embryo transfer include younger age, absence of ovarian hyperstimulation syndrome, good endometrial condition, normal progesterone levels, and high-quality embryos. Age is an important factor affecting fresh embryo transfer, as female fertility typically declines with advancing age. Older women may require higher-quality embryos and additional support to achieve successful pregnancy.
Conditions for fresh embryo transfer include younger age, absence of ovarian hyperstimulation syndrome (OHSS), good endometrial condition, normal progesterone levels, and high-quality fertilized eggs. Specific details are as follows:
1. Younger Age
Age is a significant factor affecting fresh embryo transfer, as female fertility typically declines with age. Older women may require higher-quality embryos and additional support to achieve successful pregnancy.
2. Absence of Ovarian Hyperstimulation Syndrome (OHSS)
Embryo transfer is categorized into fresh embryo transfer and frozen-thawed cycle transfer. Fresh embryo transfer is performed in the same cycle as oocyte retrieval and requires specific conditions. If factors such as a large baseline ovarian volume are present, performing fresh embryo transfer may exacerbate OHSS. Generally, the number of retrieved oocytes should not be excessive, and serum estrogen levels should not be too high. Fresh embryo transfer is usually not recommended when more than 25 oocytes are retrieved.
3. Good Endometrial Condition
Fresh embryo transfer requires a healthy endometrium. If the endometrium is too thin, the likelihood of implantation failure increases; therefore, transfer during that cycle is generally not advised.
4. Normal Progesterone Levels
Elevated progesterone levels indicate reduced endometrial receptivity, increasing the risk of implantation failure. Therefore, fresh embryo transfer is not recommended in cycles with high progesterone levels.
5. High-Quality Fertilized Eggs
The embryos selected for transfer should be of sufficient quality to support pregnancy. Typically, embryos must reach a specific stage of cell development—such as the blastocyst stage—during culture before being considered suitable for transfer.
If there are any questions regarding the above conditions, it is advisable to consult a qualified physician for professional guidance.
