<unk>  <unk>  or BTP) is the lowest<unk><unk>  attained during rest (usually during sleep). It is usually estimated by a<unk>  measurement immediately after awakening and before any physical activity has been undertaken. This will lead to a somewhat higher value than the true<unk> . In women, ovulation causes a sustained increase of at least in<unk> . Monitoring<unk> s is one way of estimating the day of ovulation. The tendency of a woman to have lower<unk> s before ovulation, and higher<unk> s afterwards, is known as a biphasic<unk>  pattern. Charting this pattern may be used as a component of fertility awareness. The<unk>  of men is comparable to the<unk>  of women in their follicular phase.
Basal body temperature
Electrodermal activity
Basal metabolic rate
Segmental blood pressure
Heart rate variability
Cardiac cycle
Intracranial pressure
Cardiac output