Although there is a clear menstrual pattern in fluid retention, the peak occurs at a time when estradiol and progesterone levels are low. Perhaps there is a lag of fluid dynamics in response to previous higher hormone levels. Fluid retention around flow was similar between anovulatory and ovulatory cycles (although we had few anovulatory cycles for this analysis); therefore self-perceived fluid retention/bloating is unlikely to be due to the actions of progesterone. Although our hormone sample size was modest, there is no indication of a relationship between pooled hormone levels of estradiol and progesterone and fluid retention scores.

The text you provided is a scientific explanation about the relationship between menstrual cycle, hormone levels, and fluid retention in the body. It suggests that despite a clear pattern of fluid retention during the menstrual cycle, the peak of this retention occurs when the levels of two hormones, estradiol and progesterone, are low. This could possibly be due to a delay in fluid dynamics in response to previously higher hormone levels.

The text also mentions that fluid retention around the menstrual flow was similar between anovulatory (cycles where ovulation does not occur) and ovulatory cycles. This suggests that the self-perceived bloating or fluid retention is unlikely to be due to the actions of progesterone.

Lastly, the text indicates that despite the modest sample size for hormone levels in their study, there is no apparent relationship between pooled hormone levels of estradiol and progesterone and fluid retention scores.