Among the hormonal methods freely available in government facilities are two types of pill, an injectable (Depo-Provera) and the implant (Implanon). The latter two technologies are known to disrupt the menstrual cycle through stopping bleeding or spotting. Women attending the publicly funded family planning clinics tend to be from low-income families, have little education and are unfamiliar with the biomedical model of the female body’s physiology. On the base of a humoral physiological model, they interpret the cessation of the menstrual cycle as the retention of the toxic blood accumulated during the month, which they see as the cause of somatic disorders. The disruption of the menstrual cycle replaced by a uniform and linear pharmacological time deprived of cyclical bleeding is the source of anxieties among many underprivileged and little educated Tunisian women and the root of their resistance to hormonal contraception. Limited access to formal education and the still high rate of illiteracy among poor women contribute to perpetuating popular conceptions of female physiology that contrast with biomedical representations of the body legitimizing the use of biomedical contraception. Thus, hormonal contraception unsettles and question the rhythms of the intimate, social and religious existence of this category of women. This chapter examines the tensions between the biomedical and the humoral representations of the female physiology and the conceptions of time related to each of them to explain the misunderstandings about contraception between healthcare providers and clinic users. It also investigates how the relationships between the biomedical and the popular paradigm of the body is strictly related to social, economic and educational inequalities, which in turn determine very different notions of physiological and intimate time.