Low-dose progestin-releasing contraceptives are associated with a higher pain threshold in healthy women - Máximo, Manuela Menezes; Silva, Patrícia Silveira; Vieira, Carolina Sales; Gonçalvez, Thaís Magetti; Rosa e Silva, Júlio César; Reis, Francisco José Cândido dos; Nogueira, Antonio Alberto; Poli Netto, Omero Benedicto (Fertility and Sterility, 2015)