“…These included the following: immunoglobulin E (IgE) levels ( 6), 12,61,89,99,100,106 biopsy (4), 15,26,45,56 progesterone antibody test (2), 35,38 ELISpot assay, 42 in vitro interferon-γ release test, 31 lymphocyte transformation challenge, 91 oral progesterone challenge, 22 vaginal progesterone challenge, 51 progesterone pessary challenge, 58 mast cell testing, 6 progesterone add-back challenge, 67 salivary enzyme immunoassay, 17 and water load test. 98…”