Figure 2. Circadian GH secretory profiles in anestrous bitches. Main panel: Individual plasma GH profiles in 12 crossbred anestrous bitches. Large inset: GH plasma profiles of the 12 animals taken together. Data are expressed as least squares mean ± standard error of mean (LSM ± SEM) of GH values (ng/mL). Small inset: Plasma GH levels during day and night in the same animals. Data are expressed as above.