Figure 7From: Aromatase inhibitor treatment with an intravaginal device and its effect on pre-ovulatory ovarian follicles in a bovine modelPlasma letrozole concentration (mean ± SEM). Heifers (n=4) were given an intravaginal letrozole-releasing device for 6 days. *Between indicated time points, values differed (P≤0.05).Back to article page