• In this study, the novel endocrine and classical fertility traits of Swedish dairy herds were evaluated using in-line milk progesterone profiles in ssGWAS approach. The genomic regions associated with identified. A total 20 QTLs, which 18 them are novel, detected. QTL embedded candidate genes ( ATG7, GPI, GJA1, PPP3CA, ECT2, ARHGAP20, PHLDB1, CACNA1D, CCNE1, CDH13, PLD1, FBN2, KIF3A, FGF12, K...

The two subspecies of white rhinoceros, southern (Ceratotherium simum simum) and northern (Ceratotherium simum cottoni), breed poorly in captivity, and estimates of oestrous cycle length vary considerably (range, 25-90 days). To characterise reproductive patterns, faecal samples were collected 2-3 times/week for up to 56 months from non-pregnant animals (n=21) of both subspecies. Immununoreacti...

The decline of fertility in the UK dairy herd and the unfavorable genetic correlation (r(a)) between fertility and milk yield has necessitated the broadening of breeding goals to include fertility. The coefficient of genetic variation present in fertility is of similar magnitude to that present in production traits; however, traditional measurements of fertility (such as calving interval, days ...

The role of the uterus and that of the embryo in regulating luteal progesterone secretion appear to differ greatly, depending on the mammal. However, the situation is analogous in some mammals. The main role of luteal progesterone is to permit the establishment and maintenance of pregnancy, and there appears to be a relationship between the type of placenta and the uterine and embryonic modes o...

Metabolic hormones have been associated with reproductive function modulation. Thus, the aim of this study was: (i) to characterize the immunolocalization, mRNA and protein levels of leptin (LEP), Ghrelin (GHR) and respective receptors LEPR and Ghr-R1A, throughout luteal phase; and (ii) to evaluate the role of LEP and GHR on progesterone (P4), prostaglandin (PG) E2 and PGF2α , nitric oxide (nit...