Why do women gain weight during their menstrual cycle?

Most women experience weight gain or fluctuation during their menstrual cycle, the Cleveland Clinic reported. Obstetrician-gynaecologist Dr Alison Stalzer explained that after ovulation, progesterone levels rise, making the body more prone to retaining weight. She said the increase in progesterone levels can make the body more prone to retaining water, which can also lead to temporary weight gain.