OXT and ovarian carcinoma: The prevalent conclusions were that more childbearing (greater TFR) may protect against female breast cancer [6, 7], corpus uteri cancer [8] and ovarian cancer [9] due to less oestrogen production or less menstrual cycles [10] and more oxytocin secretion [11, 12], but may contribute to cervix uteri cancer because of more exposure to infection risk [13].