Peter Attia· MD
as a woman is entering that perimenopausal period you want to be especially attentive to the time in which you draw again day three four five become the most important blood draws as a woman is becoming perimenopausal because it's that FSH level at day three four and five that becomes your Canary in the coal mine if that level starts creeping up and it's over 10 11 12 even though she's not in menopause I'm going to tell her she's probably getting close