Kick-starting ovarian cyclicity by using dietary glucogenic precursors in post-partum dairy cows: a review

Post-partum anoestrus in dairy cows: a review.

In modern high-yielding dairy herds fertility is of major economic importance. In order to gain maximum profit, calving intervals should not exceed 365 days. The achievement of a 365-day calving interval requires an early resumption of ovarian activity, an excellent oestrus detection, and a high first-service conception rate. Especially the inability to detect oestrus and to mate the cows by 60...

Effect of Tetracosactid on Post Partum Cyclicity in Cows after Induction of Parturition with PGF2α

Parturition and retention of fetal membranes were induced with PGF2 alpha in 3 primiparous dairy cows. Starting on day 12 post partum (PP) the cows were treated with 500 micrograms i.m. of ACTH-analogue (tetracosactid) every 6 h for 6 times. Changes in plasma concentrations of cortisol, progesterone and 15-ketodihydro-PGF2 alpha were evaluated immediately after treatment. The effects on the res...

Hormonal and ovarian responses to a 5-day progesterone treatment in anoestrous dairy cows in the third week post-partum.

Primiparous cows with low body condition at calving have an extended anovulatory period. Induction of ovulation and oestrus is possible with progesterone treatment but the response to this treatment differs between Friesian and Jersey breeds. The objective of this study was to describe changes in pulsatile LH secretion and the synchrony of developing ovarian follicles that occur during a proges...

Effects of dietary polyunsaturated fatty acids on ovarian function and prostaglandin secretion in lactating dairy cows

As lactating cows in severe negative energy balance have poor reproductive performance, the effect of dietary fat supplementation (fish oil, soybean oil) on PGFM secretion, ovarian function and blood metabolites is investigated. In this experiment, the effects of dietary polyunsaturated fatty acids on plasma metabolites, ovarian function and prostaglandin secretion of 20 primiparous Holstein co...

Factors affecting post partum milk production and ovarian activity of small scale dairy cows in the Western Highlands of Cameroon