One of Progyny's big clients is bailing on the fertility solutions provider.Shares of Progyny (PGNY -29.86%) were crashing 30.1% lower as of 11:22 a.m. ET on Thursday. The steep decline came after the fertility benefits provider disclosed in a regulatory filing that it was losing an unnamed major client.Progyny said that the client "confirmed they had no issues of concern over the course of its multiyear relationship with the Company, including member satisfaction or quality of service or outcomes." It also ...