Behavioral estrus of castrated and with progesterone treated ewes, induced by implantation of 17-beta-estradiol into the area controlling the sexual behavior, was completely modified as compared with that of castrated but non treated with progesterone ones. The length of behavioral estrus in the non treated ewes was 24-30 hr and its symptoms were rather weakly expressed. On the contrary, the ew...

The CIDR is an intravaginal progesterone insert, used in conjunction with other hormones to synchronize estrous in beef and dairy cows and heifers. The CIDR was developed in New Zealand and has been used for several years to advance the first pubertal estrus in heifers and the first postpartum estrus in cows. The CIDR is a “T” shaped device with flexible wings that collapse to form a rod that c...

Progesterone is an important reproductive hormone and measurement of its level by repeated blood samplings is beneficial to monitoring of estrus cycle. However, since toy poodles have a small body size and thin-walled blood vessels, repeated blood samplings cause stress and affect their preparation for mating or artificial insemination (AI). Therefore, a noninvasive method for monitoring proges...

The production of plasminogen activator by the human breast cancer cell line MCF-7 was stimulated by physiological concentrations of estradiol under conditions where the growth of the cells was neither dependent on nor stimulated by estradiol. Stimulation was measurable within 8 hr after the addition of estradiol and was evident in both the level of plasminogen activator released into the cultu...

Background The effect of elevated progesterone level on human chorionic gonadotropin (HCG) day in in vitro fertilization cycles is controversial. Some suppose that rise in progesterone level seems to have a negative impact on implantation and pregnancy by desynchronizing the endometrium, while others disagree. Objective To evaluate the superiority of the frozen cycle over fresh cycle on live ...

To test further the idea that sexual behavior in rodents is mediated via the progesterone receptor (PR) in the ventromedial nucleus of the hypothalamus, antisense and sense oligonucleotides to progesterone receptor were administered intracerebroventricularly into the third cerebral ventricle of ovariectomized estrogen-primed animals. Progesterone-facilitated sexual behavior was inhibited in ani...

Steroidogenesis requires coordination of the anabolic and catabolic pathways of lipid metabolism, but the profile of proteins associated with progesterone synthesis in cyclic and pregnant corpus luteum (CL) is not well-known in cattle. In Experiment 1, plasma progesterone level was monitored in cyclic cows (n = 5) and pregnant cows (n = 6; until d-90). A significant decline in the plasma proges...

background: intracytoplasmic sperm injection (icsi) is an advanced technique employed in assisted reproductive clinics for treatment of infertile couples. the reproductive endocrinologists try their level best to identify factors that enhance success rate after icsi. objective: to compare estradiol progesterone ratio on ovulation induction day amongst pregnancy outcome groups following icsi. ma...

traumatic brain injuries may cause some neurological deficits, such as altered level of consciousness or coma, sensory-motor dysfunction, and seizure attacks. the neuroprotective effect of progesterone and erythropoietin has been shown in different types of brain injuries and cerebral ischemia. this study aims to evaluate the probable additional neuroprotective effects of progesterone and eryth...

background & aim: electromagnetic waves can damage sex organs and cause hormonal disorders, whereas garlic is known as reducing risk factors for various diseases. the aim of this study was to investigate the probable effects of mobile phone radiation and consumption of garlic on estrogen and progesterone levels and ovarian changes. experimental: five groups of rats (n = 8) were used which g...