What is the peak time for ascites after fresh embryo transfer?

Generally, the peak period for ascites after fresh embryo transfer occurs between 3 to 7 days post-transfer. The detailed analysis is as follows:

The peak period for ascites following fresh embryo transfer typically appears between 3 to 7 days after the transfer, which may be closely related to ovarian stimulation treatment and the transfer procedure itself. In assisted reproductive technology, patients usually undergo ovulation induction therapy to obtain multiple oocytes for in vitro fertilization. These medications stimulate the ovaries, causing multiple follicles to develop simultaneously and leading to a sharp increase in estrogen levels. Elevated estrogen levels can increase vascular permeability, allowing fluid components from within blood vessels to leak into the abdominal cavity, thereby causing ascites.

The transfer procedure itself can also exert certain stimulatory effects on the body, further exacerbating this fluid leakage. During the 3 to 7 days following embryo transfer, the body's response to ovarian stimulation and the transfer procedure remains relatively strong. At this stage, estrogen levels remain high, vascular permeability continues to be elevated, and the leaked fluid continues to accumulate without being effectively absorbed by the body, resulting in a gradual buildup of ascites that reaches its peak during this time.

In daily life, it is important to follow dietary principles that include high protein, high vitamins, and easily digestible foods. Patients should consume more foods rich in high-quality protein, such as eggs, milk, and fish, to enhance plasma colloid osmotic pressure and reduce fluid leakage. At the same time, it is necessary to maintain adequate hydration while avoiding excessive water intake, which could worsen ascites symptoms.