نتایج جستجو برای: luteal function

تعداد نتایج: 1216604  

Journal: :International journal of psychophysiology : official journal of the International Organization of Psychophysiology 2012
M Kathleen B Lustyk Haley A C Douglas Elizabeth A Shilling Nancy F Woods

This study assessed whether premenstrual symptomatology and/or sleep characteristics explain increased luteal phase psychophysiological reactivity to laboratory stressors. We hypothesized that: (1) premenstrual symptoms and sleep characteristics would explain greater luteal versus follicular phase psychophysiological reactivity, (2) symptoms and sleep characteristics would differentially predic...

Journal: :Journal of reproduction and fertility 1989
G J Killian D A Chapman J F Kavanaugh D R Deaver H B Wiggin

The oviducts of 4 cows were cannulated and oviduct fluid was collected daily from the exteriorized cannulas for a total of 5 oestrous cycles. Daily serum samples were assayed for oestradiol-17 beta and progesterone to monitor the oestrous cycle. Data for each cycle were compared for oviduct fluid collected during the non-luteal phase (serum progesterone less than or equal to 1.5 ng/ml) and the ...

Journal: :The Journal of reproduction and development 2008
Hiroe Kon Hisashi Kishi Koji Y Arai Motoo Shinoda Gen Watanabe Kazuyoshi Taya

The present study was conducted to evaluate the endocrinological effects of the pituitary on luteal maintenance and regression in the cyclic golden hamster (Mesocritus auratus). After hypophysectomy (Hypox) at 0900 h on day 1 of the estrous cycle (the day of ovulation), the animals received injection of prolactin (PRL) or PRL plus equine chorionic gonadotropin (eCG). They were decapitated at 15...

2015
Harald Sieme Johannes Lüttgenau Jutta Sielhorst Gunilla Martinsson Heinrich Bollwein Selina Thomas Dominik Burger

The corpus luteum (CL) is a pivotal structure in the regulation of the estrous cycle and in the establishment of pregnancy. It is one of the most vascularised organs in the body, undergoing rapid cellular and vascular changes in order to fulfill its role. B-Mode and Doppler ultrasound has enabled further research into the equine CL and can be utilised as a clinical tool in the assessment of lut...

2017
H Vo B Smith D Rubinow

OBJECTIVE: To test hypotheses concerning patterns of caffeine consumption as a function of menstrual cycle phase in women with premenstrual syndrome (PMS), as compared with controls. METHODS: Daily symptom ratings were obtained online for two consecutive menstrual cycles. Women displaying a 30% increase in PMS symptoms during the luteal phase in both cycles were assigned to the PMS group. Parti...

Journal: :Journal of cell science 2011
Dulce Maroni John S Davis

Cyclical formation and regression of the ovarian corpus luteum is required for reproduction. During luteal regression, the microvasculature of the corpus luteum is extensively disrupted. Prostaglandin F2α, a primary signal for luteal regression, induces the expression of transforming growth factor β1 (TGFB1) in the corpus luteum. This study determined the actions of TGFB1 on microvascular endot...

Journal: :Molecular human reproduction 2004
Vijay Kumar Yadav P Muraly R Medhamurthy

The process of luteinization, during which granulosa cells are transformed into luteal cells, is accompanied by dramatic changes in the response of luteal cells to LH. Although luteal cells require LH-cAMP signalling cascade for survival, whether these cells respond to trophic factors through changes in gene expression remains poorly characterized. In an attempt to characterize gonadotrophin (L...

Journal: :Journal of reproduction and fertility 1994
J K Thibodeaux J R Broussard R A Godke W Hansel

A study was conducted to determine whether bovine blastocyst-stage embryos and trophoblastic vesicles stimulate the production of progesterone in bovine luteal cells during incubation in vitro. The effects of co-incubation of these embryos and vesicles with uterine endometrial tissue on progesterone production was also investigated. Bovine small and large luteal cells were obtained on day 12 of...

Journal: :Reproduction 2008
R S Robinson A J Hammond G E Mann M G Hunter

Luteal inadequacy is a major cause of poor embryo development and infertility. Angiogenesis, the formation of new blood vessels, is an essential process underpinning corpus luteum (CL) development and progesterone production. Thus, understanding the factors that regulate angiogenesis during this critical time is essential for the development of novel strategies to alleviate luteal inadequacy an...

2013
Víctor H Parraguez Bessie Urquieta Laura Pérez Giorgio Castellaro Mónica De los Reyes Laura Torres-Rovira Adriana Aguado-Martínez Susana Astiz Antonio González-Bulnes

BACKGROUND At high altitudes, hypoxia, oxidative stress or both compromise sheep fertility. In the present work, we tested the relative effect of short- or long-term exposure to high altitude hypobaric hypoxia and oxidative stress on corpora luteal structure and function. METHODS The growth dynamics of the corpora lutea during the estrous cycle were studied daily by ultrasonography in cycling...

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