"Is winter a better time for frozen embryo transfer? Which method is better, fresh or frozen embryos? Choosing the right method is a common dilemma during IVF procedures. This article provides a simple comparison between the two methods and clarifies a common misconception: season isn't a decisive factor.

1. First, understand what fresh and frozen embryos are

• Fresh embryo transfer: After egg retrieval and fertilization, the embryo is directly transferred into the uterus during a fresh cycle.
• Frozen embryo transfer (FET): The embryo is first frozen and stored until the woman's body (such as endometrium and hormone levels) is ready for transfer.

2. When each method is more suitable

Fresh embryos are better

• If the woman has a good ovarian response, synchronized endometrium, and no risk of excessive stimulation.
• If she wants to shorten the overall cycle and get the transfer done as soon as possible.

Frozen embryos are better

• If there's a risk of ovarian hyperstimulation after egg retrieval.
• If the endometrium isn't synchronized or hormone levels aren't optimal.
• If genetic testing (PGT) needs to be done before transfer.
• If the woman's body needs time to recover.

3. Misconception: Is frozen embryo transfer better in winter?

There's no evidence to support that winter is better for certain types of transfers. Frozen and thawed embryo techniques are well-developed, and embryo storage isn't affected by season. Whether to choose fresh or frozen embryos depends on your physical condition and treatment plan, not the season.

4. How to choose: Follow your doctor's advice

Doctors will consider factors like ovarian response, endometrium, hormone levels, whether PGT is needed, and risks of ovarian hyperstimulation, to give personalized recommendations. What you need to do is understand the advantages and disadvantages of both methods, rather than making decisions on your own.

5. Tips for frozen embryos

• Frozen embryos have costs and storage periods associated with them. It's important to know the policies of the institution.
• The preparation plan for the endometrium before thawing the embryo (natural/artificial cycle) is also determined by the doctor.

6. Reminders from Leilawa

There's no "better" method; only the "most suitable" one. Leave the decision-making to your doctor and focus on understanding the situation. This way, you can ask the right questions during your consultation.