Oestrogen levels fluctuate throughout a woman's menstrual cycle, which may impact how efficiently a drug that targets the brain can reach its destination

Source: [New Scientist](https://www.newscientist.com/article/2531651-fluctuating-oestrogen-levels-may-alter-how-drugs-enter-womens-brains/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home)

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