Animal welfare can be negatively affected when dairy cattle experience heat stress.
Managing heat stress has become more of a challenge than ever before, due to the …

The dairy industry in the United States has changed dramatically in the last decade. Milk
production per cow has increased steadily because of a combination of improved …

Milk yield per cow has more than doubled in the previous 40 years and many cows now
produce more than 20,000 kg of milk per lactation. The increase in production should be …

Good detection of estrus is critically important in dairy husbandry. Incorrect detection of
estrus is related to loss of profit due to extended calving intervals, milk loss, veterinary costs …

The objective of this study was to determine if there is an association between level of milk
production and duration of estrus as determined by standing activity recorded by a …

Ovarian function was compared between nulliparous heifers (n= 29; 10 to 16 mo old) and
lactating Holstein cows (n= 31; 55.9±3.5 d postpartum). Follicular dynamics, corpus luteum …

The cause of low fertility in dairy cows is multifactorial. Poor nutrition during the dry and early
postpartum periods results in reduced glucose, insulin, insulin-like growth factor (IGF-I) and …

The oestrous cycle in cattle lasts for 18–24 days. It consists of a luteal phase (14–18 days)
and a follicular phase (4–6 days). During the cycle there are generally two (dairy cows) or …

The objectives of the present study were to evaluate factors associated with estrous
synchronization responses and pregnancy per insemination (P/AI) in Bos indicus beef cows …

The objective of this study was to investigate the relationship between various behavioral
signs of estrous and time of ovulation and, determine which behavioral estrous sign (s) best …