ABSTRACT
Applying an intravaginal insert that contains progesterone, in combination with an injection of PGF2 a, effectively synchronizes estrus in a short-term, seven-day period (see [2] in Fig. 1). Injection of PGF2 a can occur 24 hr before or at insert removal. Inseminations occur after detected estrus or by appointment at 48 to 66 hr after insert removal.
