<unk>  (or<unk>  fluid<unk>  is felt by some women before the onset menstruation. No evidence supports actual<unk>  or sodium<unk>  however. Even though the phenomenon does not appear to be correlated to serum levels of progesterone or estradiol according to actual data, it is thought to be caused by high levels of circulating progesterone, estrogen, and prolactin, which stimulate secretory cells in the body. In the breasts, increased blood flow may be involved. A sensation of<unk><unk>  and breast swelling may also be caused by hormonal contraceptives (which contain estrogen and a progestogen).
Premenstrual water retention
Anovulatory cycle
Exercise amenorrhoea
Functional hypothalamic amenorrhea
Nocturnal penile tumescence
Antiestrogen withdrawal response
Progestin-induced virilization
Lactational amenorrhea