The National Women's Health Information Center lists these common causes of urinary tract infections in women: 1  Wiping from back to front after a bowel movement. 2  Having sex. 3  Holding urine for too long.  Being 1  diabetic. Having a kidney stone or other factor that makes it difficult to urinate.  Producing less estrogen, such as after menopause.
However, the estrogen hormones in Premarin Vaginal Cream may decrease the production and quality of breast milk. It is for this reason that estrogen-containing medications (including Premarin Vaginal Cream and many birth control pills) are not usually recommended for women who are breastfeeding.
However, if you are having a difficult pregnancy and are at risk for early labor, and in particular have been told to avoid sex during pregnancy, then weaning would probably be advisable. (Oxytocin is also the hormone released during female orgasm.) Your milk is safe for your breastfeeding child.