Progesterone causes the cells to shed into the vagina, so the sugar becomes available for yeast to feed on, multiply, and grow. Yeast infection symptoms can follow the hormonal pattern of this cycle. Often, the most severe symptoms occur before the onset of your period when more sugar is available. During and after the flow, symptoms are likely to subside. Yes, because more sugar is produced during pregnancy.
Many women get yeast infections during the third trimester.
As childbirth approaches, yeast infections can be even more common. After delivery, hormone levels change dramatically, and symptoms of yeast infections disappear in a few days because the new vaginal environment does not support yeast growth. If you are pregnant or think you may be pregnant, do not use any products to treat a yeast infection except under the advice and supervision of a doctor. It is also possible to develop a yeast infection after menopause, either as a result of taking antibiotics, high doses of estrogens, or as a complication of diabetes. You can't cure a yeast infection in a day.