Hi, Nocturnal enuresis is basically involuntary urination that happens at night while sleeping after the age when a person should be able to control his or her own bladder. Recent studies show that there is a relation between nocturnal enuresis and oral contraceptives consumption. Women who used oral contraceptives like Cerazette birth control pill were found to be 27% more likely to experience leakage at least weekly compared with women who had never taken them according to US research. The risk was was found to increase significantly with increasing duration of contraceptive use. Oral contraceptive pill use may be associated with modestly increased risk of urinary incontinence among the users. No biological link between oral contraceptive like Cerazette birth control pill use and incontinence has yet been established, but changes in collagen composition and increased bladder contractility have been proposed, said the researchers. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Zubayer Alam, General And Family Physician