Monitoring of canine pregnancy by considering Anti-Mullerian hormone, C-reactive protein, progesterone and complete blood count in pregnant and non-pregnant dogs.

In this study, we measured the serum concentration of anti-Mullerian hormone (AMH), C-reactive protein (CRP), progesterone (P4), and the complete blood count (CBC) in pregnant and non-pregnant bitches. The aim was to investigate the suitability of these parameters for monitoring canine pregnancy. Blood samples were collected from all bitches introduced for timed mating on the day of first mating (>5 ng/ml).

The Effect of Comfort- and Hot-Period on the Blood Flow of Corpus Luteum (CL) in Cows Treated by an OvSynch Protocol.

The values of luteal blood flow (LBF), total corpus luteum (CL) area (TAR), and progesterone (P4), during and after OvSynch (OvS) protocol in comfort (CP; = 40) and hot periods (HP; = 40) were compared. We investigated how low and high P4 values obtained before the application affected the parameters above during CP and HP periods. Blood samples were collected before the OvS application on day 0 (OVSd0), day 9 (OeG), and day 18 (9th day after OeG: OvSd9).

Comparison of the endocrinological and immunological results of different induction of parturition methods in ewes.

Objective: This study aimed to compare different induction of partu -rition (IP) methods in terms of endocrinological and immunological parameters in ewes and lambs.

Materials And Methods: A total of 24 ewes and their respective 24 lambs were studied. Groups of six ewes were induced on the 138th day: groups I (control), II (dexamethasone), III (aglepristone) and IV (aglepristone + dexamethasone).

Investigations into the mechanisms controlling parturition in cattle.

A pronounced increase in fetal cortisol concentrations stimulating an increase in estrogen production at the expense of progesterone precursors in the placenta, luteolysis, and progesterone withdrawal is considered as a key event during the complex signal cascade leading to the initiation of parturition in cattle. However, there are many questions concerning the exact functional and/or temporal relationships between these individual processes which finally result in the expulsion of the calf and the timely release of the placenta. Thus, parturition was induced in 270-day pregnant cows using the progesterone receptor blocker aglepristone (group AG, n=3), the prostaglandin F(2α) analog cloprostenol (group PG, n=4), and the glucocorticoid dexamethasone (group GC, n=4) to characterize the effect on maternal steroid and prostaglandin levels and to identify immediate subsequent changes in placental morphology and gene expression as compared with untreated controls sampled on day 272 (group D272, n=3) and cows during normal parturition (group NT, n=4).

Unilateral and bilateral laparoscopic ovariectomy in 157 mares: a retrospective multicenter study.

Objective: To evaluate surgical techniques, perioperative complications and outcome of laparoscopic surgery for unilateral and bilateral ovariectomy in mares.

Study Design: Retrospective multicenter case series.

Animals: Mares (n = 157).

Use of the progesterone (P4) receptor antagonist aglepristone to characterize the role of P4 withdrawal for parturition and placental release in cows.

In late pregnant cows, progesterone (P(4)) is mainly of luteal origin. However, the trophoblast may provide high local P(4) concentrations in the uterus. To test for the importance of a complete P(4) withdrawal for parturition-related processes and placental release, the P(4) receptor (PGR) blocker aglepristone (Ap) was administered to three cows on days 270 and 271 of pregnancy.

Unilateral hysterectomy (cornuectomy) in the bitch and its effect on subsequent fertility.

During caesarean section of bitches a beginning tissue necrosis of the uterus is often encountered. These alterations mostly require ovariohysterectomy that means the end of breeding life. The aim of this study was to create a model for unilateral hysterectomy during dystocia and to evaluate subsequent fertility.