Early Perimenopause: Symptoms in Your Late 30s and Early 40s
Early perimenopause can start in the late 30s or early 40s, though it is more common mid-40s. Early signs include subtly shorter cycles, new PMS intensity, occasional sleep disruption, and mood changes. If you notice these before 40, it is worth discussing with a doctor.
Early signs to watch for
Perimenopause often announces itself subtly before obvious symptoms appear.
- Cycles becoming slightly shorter (e.g., 25 days instead of 28).
- PMS feeling more intense than before.
- Sleep disruptions, especially premenstrually.
- Mood changes or increased anxiety.
Track how you feel and spot the pattern
PhaseBloom logs your symptoms and mood against your cycle in seconds a day, so you can see which days hit hardest and prepare before they arrive.
Track how you feel and spot the pattern
PhaseBloom logs your symptoms and mood against your cycle in seconds a day, so you can see which days hit hardest and prepare before they arrive.
Frequently asked questions
Can perimenopause start at 35?
It is uncommon but possible. Perimenopause before 40 is called early perimenopause and should be evaluated by a doctor to rule out other causes and discuss management.
How do I know if I'm starting perimenopause early?
Changing cycle length, new PMS severity, sleep disruption, and mood shifts in your late 30s or early 40s may signal early perimenopause. Hormone testing can help confirm.