Hair regrowth is biological, so it follows a clear, predictable timeline.
The earliest sign, less shedding, shows up within the first few weeks. New growth takes a little longer, because a follicle has to wake up before it can push out new hair.
After 1–2 treatments (Weeks 1–4): The shedding stops. Less hair in the brush, the drain, and on your pillow. Your hair starts to feel thicker and stronger in your hand. Underneath, dormant follicles are switching back on.
After 3–4 treatments (Weeks 5–8): Baby hairs appear along your part and hairline. Your part starts to look less exposed. New growth comes in thicker with each treatment.
After 6 treatments (Weeks 9–12): Your part fills in and your ponytail wraps fuller. Density is visibly, measurably back. The regrowth is yours to keep, no need to keep treating.
Most women notice the early signs sooner than they expected.