Changes in appetite occur during the ovarian cycle in female mammals. Research on appetite-regulatory gastrointestinal peptides in females is limited, because reproductive changes in steroid hormones present additional experimental factors to control for. This study aimed to explore possible changes in the orexigenic (appetite-stimulating) gastrointestinal peptide hormone ghrelin during the rod...

The present experiment was aimed to assess imidacloprid induced alterations in oestrous cycle and ameliorative effects of Withania somnifera rats. 48 female albino Wistar rats were divided into four groups 12 animals each. Group 1 is control, group 2 (30 mg/kg body weight/d), 3 (1 g/kg feed) 4 imidacloprid+Withania weight/ d+1 feed). test chemical administered daily by oral gavage for 30 d. Sev...

ewes injected with progesterone every 2 days over a 12-day period, followed 2 days later by a single injection of oestradiol, the prostaglandin F level in peripheral plasma rose significantly about 6 hr after the oestrogen treatment. Levels of prostaglandin F had returned to those seen before the oestrogen injection by 18 to 24 hr after the oestrogen treatment. In some ovariectomized animals, a...

The oviduct epithelium undergoes marked morphological and functional changes during the oestrous cycle. To study these changes at the level of the transcriptome we did a systematic gene expression analysis of bovine oviduct epithelial cells at oestrus and dioestrus using a combination of subtracted cDNA libraries and cDNA array hybridisation. A total of 3072 cDNA clones of two subtracted librar...

Hormone secretion often occurs in a pulsatile manner. In this review, we discuss two rhythms of in vivo prolactin release in female rats and the ongoing research that we and others have performed aiming to understand the mechanisms underlying them. The peptide hormone oxytocin appears to play an important role in both rhythms. One rhythm occurs during the first half of pregnancy, but can also b...

Ovulation rate, fertilization rate and prenatal mortality were studied in yearling beef heifers treated with PMSG or FSH and in non-treated controls. Oestrus was synchronized in 50% of the animals in each treatment with an oral progestagen. The gonadotrophin injections were given during the normal oestrous cycle or during the progestagen-administration period. All heifers were inseminated 6 to ...