The Menstrual Cycle
In the follicular phase, oestrogen drives breast tissue development. After ovulation, progesterone causes fluid retention and tenderness. Self-examination is most consistent a few days after menstruation ends, when hormonal influence is at its minimum.
Perimenopause
Fluctuating hormones can cause breast changes and altered cyclical patterns. Maintaining monthly examination through this transition provides continuity of awareness.
HRT
Combined HRT can increase breast density and carries a small associated increase in breast cancer risk. One factor to weigh with your doctor alongside its significant benefits for many people.


