Just how bad are the menstrual and gynecological problems? One recent survey of 6,049 women from May 16, 2021, through December 31, 2021, right after most young women got the shot, found 292, or 4.8%, of the respondents self-reported a case of decidual cast shedding (DCS). DCS is a rare gynecological disorder in which a woman sheds her entire uterine lining intact through the vaginal canal as if she were having menstrual bleeding. It is so rare that the authors of this paper could only find 40 documented cases in 109 years.