Fresh embryo transfers in IVF involve transferring an embryo soon after retrieval and fertilization, typically 3-5 days later. This process usually requires careful timing with the woman’s natural cycle and often involves significant use of ovulation-stimulating drugs. In contrast, frozen embryo transfers use embryos that have been cryopreserved and can be implanted in later cycles, which allows for more flexibility in timing and can reduce the need for medications in the lead-up to the transfer. Some studies suggest that frozen transfers may offer slightly higher success rates due to the better synchronization of the womb’s lining, potentially leading to improved implantation.