OXT and breast cancer: However, slightly significant higher levels were found in preMP–but not postMP women 6 to 24 months after surgery when compared with the values obtained at the time of the surgery (Figure 2A).Additionally, in women with BC treated with NACH, there was a significant decrease (p < 0.01) in oxytocin levels in both pre and postmenopausal women at the time of the surgery when compared with control women (Figure 2B).