Veterinary Medicine International / 2011 / Article / Tab 4

Review Article

Treatments to Optimize the Use of Artificial Insemination and Reproductive Efficiency in Beef Cattle under Tropical Environments

Table 4

Reproductive endpoints in prepubertal Bos indicus heifers that received, between d-12 and 0, no treatment (CIDR0), a new intravaginal insert containing 1.9 g of progesterone (CIDR1), or a similar intravaginal insert that had previously been used three times (CIDR4). The breeding season started on d 1 and consisted of AI after estrus detection between d 1 and 45 and exposure to bulls between d 46 and 90. Adapted from Claro Júnior et al. [15].

Dependent variableTreatment
CIDR0CIDR1CIDR4

Progesterone on d 0, ng/m
Follicle diameter on d 0, m
Uterine score on d
Interval to estrus,
Estrus detection in 7 d, % 19.5 (22/113)42.6 (101/237)39.3 (94/239)
Conception rate in 7 d, % 27.3 (6/22)33.7 (34/101)46.8 (44/94)
Pregnancy rate in 7 d, % 5.3 (6/113)14.3 (34/237)18.4 (44/239)
Estrus detection in 45 d, % 52.2 (59/113)72.1 (171/237)75.3 (180/239)
Pregnancy rate in 45 d, % 27.4 (31/113)39.2 (93/237)47.7 (114/239)
Pregnancy rate in 90 d, % 72.6 (82/113)83.5 (198/237)83.7 (200/239)

Treatment ( ).

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