The tendency to develop mild pelvic effusion after ovulation or the aggravation of existing pelvic effusion is considered to be influenced by the hormone level in the body. During ovulation, the secretion of estrogen and progesterone increases, resulting in pelvic tissue congestion and edema. If there is inflammation in the pelvic cavity, inflammatory exudate will form pelvic effusion, also known as physiological pelvic effusion, which is likely to occur during ovulation, menstruation and fertilization of the egg, and will have a certain impact on normal conception. After ovulation, the egg will travel with the fallopian tube to unite with the sperm. The process of egg travel will also cause some irritation to the pelvic tissues, inducing edema and fluid in the pelvic tissues. If a woman is already suffering from pelvic effusion, the symptoms of pelvic effusion are easily aggravated during ovulation, menstruation, fertilization and intercourse.