نتایج جستجو برای: sexual cycle

تعداد نتایج: 386745  

2016
Sara Moeys Johannes Frenkel Christine Lembke Jeroen T. F. Gillard Valerie Devos Koen Van den Berge Barbara Bouillon Marie J. J. Huysman Sam De Decker Julia Scharf Atle Bones Tore Brembu Per Winge Koen Sabbe Marnik Vuylsteke Lieven Clement Lieven De Veylder Georg Pohnert Wim Vyverman

Although sexual reproduction is believed to play a major role in the high diversification rates and species richness of diatoms, a mechanistic understanding of diatom life cycle control is virtually lacking. Diatom sexual signalling is controlled by a complex, yet largely unknown, pheromone system. Here, a sex-inducing pheromone (SIP(+)) of the benthic pennate diatom Seminavis robusta was ident...

2014
Ersilia Satta Carlo Magno Alessandro Galì Antonino Inferrera Roberta Granese Carmela Aloisi Michele Buemi Guido Bellinghieri Domenico Santoro

Few studies address alteration of sexual function in women with diabetes and chronic kidney disease (CKD). Quality of life surveys suggest that discussion of sexual function and other reproductive issues are of psychosocial assessment and that education on sexual function in the setting of chronic diseases such as diabetes and CKD is widely needed. Pharmacologic therapy with estrogen/progestero...

Journal: :The Journal of adolescent health : official publication of the Society for Adolescent Medicine 2008
Karin L Brewster Kathryn Harker Tillman

PURPOSE To describe patterns of heterosexual oral sexual experience in a nationally representative sample of youth aged 15 to 21 and identify social and demographic correlates of oral sexual experience among youth who had not engaged in vaginal intercourse. METHODS Descriptive analysis and multinomial logistic regression using data from Cycle 6 of the National Survey of Family Growth, conduct...

Journal: :Hormones and behavior 1998
J L Zehr D Maestripieri K Wallen

Copulation and female initiation of sexual behavior vary across the ovarian cycle, suggesting that female hormonal condition influences female sexual motivation in rhesus monkeys. However, the effects of hormones on female sexual motivation are difficult to identify because male behavior also varies with female hormonal condition. During the nonbreeding season, male rhesus monkeys are sexually ...

Journal: :Psychological science 2009
Carlos David Navarrete Daniel M T Fessler Diana Santos Fleischman Joshua Geyer

Although a considerable body of research explores alterations in women's mating-relevant preferences across the menstrual cycle, investigators have yet to examine the potential for the menstrual cycle to influence intergroup attitudes. We examined the effects of changes in conception risk across the menstrual cycle on intergroup bias and found that increased conception risk was positively assoc...

Journal: :Journal of acquired immune deficiency syndromes 2008
Sarah Benki Sara B Mostad Barbra A Richardson Kishorchandra Mandaliya Joan K Kreiss Julie Overbaugh

Levels of HIV-1 RNA in endocervical specimens fluctuate with the menstrual cycle, suggesting that cell-free HIV-1 levels may vary during the cycle, which could influence infectivity. Here, we examined daily changes in endocervical HIV-1-infected cells during 1 cycle. There were significant positive associations between the number of days from the luteinizing hormone surge and the number of HIV-...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2003
Kaiyao Huang Christoph F Beck

Blue light as an environmental cue plays a pivotal role in controlling the progression of the sexual life cycle in the green alga Chlamydomonas reinhardtii. Phototropin was considered a prime candidate for the blue-light receptor involved. By using the RNA interference method, knockdown strains with reduced phototropin levels were isolated. Those with severely reduced levels of this photorecept...

Journal: :Trends in parasitology 2002
Robert Poulin Thomas H Cribb

Complex life cycles are a hallmark of parasitic trematodes. In several trematode taxa, however, the life cycle is truncated: fewer hosts are used than in a typical three-host cycle, with fewer transmission events. Eliminating one host from the life cycle can be achieved in at least three different ways. Some trematodes show even more extreme forms of life cycle abbreviations, using only a mollu...

Journal: :journal of midwifery and reproductive health 0
sedigheh yousefzadeh msc of midwifery, mashhad university of medical sciences, mashhad, iran nahid golmakani msc of midwifery, mashhad university of medical sciences, mashhad, iran fatemeh nameni msc of midwifery, golestan university of medical sciences, gorgan, iran

background & aim: one of the most important events in human life is marriage. sexual satisfaction is one of the effective factors in a successful marriage. accordingly, sexual health education is necessary. sex education should be in line with the cultural, religious, and social infrastructures of the society. the aim of this study was to compare the effect of sex education with and without rel...

Journal: :مجله دانشگاه علوم پزشکی شهید صدوقی یزد 0
صدیقه اخوان کرباسی s akhavan-karbasi . [email protected] مطهره گلستان m golestan راضیه فلاح r fallah فهیمه سادات میرناصری f mir-naseri مهدخت صدر بافقی m sadr-bafghi

introduction: genetic and health factors along with ethnicity and geographic location are factors that affect the time of puberty onset. the aim of the present study was to evaluate the mean age of onset of puberty and its stages in boys of yazd. methods: this cross- sectional study with random clustering sampling method was conducted on 1018 healthy 9-16 years old male students of yazd. all ca...

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