نتایج جستجو برای: luteal function

تعداد نتایج: 1216604  

Journal: :iranian journal of veterinary research 2013
r. shahrooz m. razi a. babai

this study was conducted to evaluate histochemical alterations of river buffalo’s uterine wall acid andalkaline phosphatases (alp and acp), lipase and carbohydrate ratio during follicular and luteal phases.forty apparently healthy and non pregnant river buffalos were considered for removal of the uterus aftersacrifice in slaughterhouse. all dissected uteri were divided into two luteal (by obser...

2013
Shin Yoshioka Hironori Abe Ryosuke Sakumoto Kiyoshi Okuda

The rapid growth of the corpus luteum (CL) after ovulation is believed to be mainly due to an increase in the size of luteal cells (hypertrophy) rather than an increase in their number. However, the relationship between luteal growth and the proliferation of luteal steroidogenic cells (LSCs) is not fully understood. One goal of the present study was to determine whether LSCs proliferate during ...

Esmail Ayen Saleh Tabatabaei, Shapour Hasanzadeh

The aim of this study was to evaluate the defense cells changes of cervical mucous during follicular and luteal phases of estrus cycle in river buffalo. Reproductive organs of the adult and apparently healthy female buffaloes were collected from the slaughterhouse. By visual investigation of both the ovaries for presence of corpus luteum and growing follicles, the luteal and follicular phase of...

Journal: :Reproductive biology and endocrinology : RB&E 2003
Luiz E Henkes John S Davis Bo R Rueda

The corpus luteum is a unique organ, which is transitory in nature. The development, maintenance and regression of the corpus luteum are regulated by endocrine, paracrine and autocrine signaling events. Defining the specific mediators of luteal development, maintenance and regression has been difficult and often perplexing due to the complexity that stems from the variety of cell types that mak...

Journal: :Proceedings. Biological sciences 2012
Imke Lueders Cheryl Niemuller Peter Rich Charlie Gray Robert Hermes Frank Goeritz Thomas B Hildebrandt

The corpus luteum, a temporally established endocrine gland, formed on the ovary from remaining cells of the ovulated follicle, plays a key role in maintaining the early mammalian pregnancy by secreting progesterone. Despite being a monovular species, 2-12 corpora lutea (CLs) were found on the elephant ovaries during their long pregnancy lasting on average 640 days. However, the function and th...

Journal: :Animal reproduction 2012
M C Wiltbank S M Salih M O Atli W Luo C L Bormann J S Ottobre C M Vezina V Mehta F J Diaz S J Tsai R Sartori

The corpus luteum (CL) is a transient endocrine organ that is essential for maintenance of pregnancy in both ruminants and primates. The cellular and endocrine mechanisms that regulate the CL in these species have commonalities and some distinct and intriguing differences. Both species have similar cellular content with large luteal cells derived from the granulosa cells of the follicle, small ...

Journal: :Journal of animal science 1987
T R Hansen R D Randel E C Segerson L M Rutter P G Harms

Corpus luteum (CL) function following spontaneous or prostaglandin F2 alpha-induced estrus was studied in 27 Brahman cows and 16 Brahman heifers. Females received one injection of 0, .38, .75 or 2.25 mg alfaprostol (PGF)/100 kg body weight at 12 +/- .1 d post-estrus. Serum progesterone (P4) during CL formation, following the subsequent estrus, increased over time (P less than .001, 1 to 13 d po...

2010
Adam D Martin Marit L Lystad Olav Reksen Erik Ropstad Andres Waldmann Ola Nafstad Knut Karlberg

BACKGROUND Reproduction is the single greatest factor limiting beef cattle production. Previous research on beef suckler luteal activity has largely focused on the mechanisms, and duration, of postpartum anoestrus. However, the temporal pattern of luteal activity after resumption of post-partum ovarian activity, and the impact of pattern type on days open (DO) in purebred beef suckler cows, are...

Journal: :The Journal of endocrinology 2010
Massimo Zerani Francesco Parillo Gabriele Brecchia Gabriella Guelfi Cecilia Dall'Aglio Lorena Lilli Margherita Maranesi Anna Gobbetti Cristiano Boiti

The expression of type I GNRH receptor (GNRHR-I) and the direct role of GNRH-I on corpora lutea (CL) function were studied in the pseudopregnant rabbit model. Immunohistochemistry evidenced GNRHR-I and GNRH-I in luteal cells at early (day 4 pseudopregnancy)-, mid (day 9)-, and late (day 13)-luteal stages. Real-time RT-PCR and western blotting revealed GNRHR-I mRNA and protein at the three lutea...

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