Results 201 to 210 of about 62,614 (258)

‘I'd rather have worse gums than worse lungs’: Young people's views of nicotine pouches in the UK

Addiction, EarlyView.
Abstract Background and aims Nicotine pouches entered the UK market in 2019. Although research has shown that young people's prevalence of use has been low, it has been reported to be increasing and a cause for concern. This paper reports the findings of the first qualitative study in the UK to explore the views of 14–16 year olds' knowledge, awareness
Andy MacGregor, Jessica Shields, Asiya Hamid, Eleanor Holman, Hannah Biggs, Sarah Minty, Jamie Pearce, Allison Ford   +7 more
wiley   +1 more source

Toward a Politics of (In)Fertility: Reproductive Debility in Africa

American Anthropologist, EarlyView.
ABSTRACT Sub‐Saharan Africa has some of the highest estimated rates of infertility or involuntary childlessness in the world, leading epidemiologists to refer to parts of the region as the “infertility belt.” The medicalization of infertility and the situating of assisted reproductive technologies (ARTs) as the treatment for infertility have siphoned ...
Tessa Moll
wiley   +1 more source

Testicular histopathology and its association with germ cell numbers, serum concentrations of reproductive hormones, and semen quality

Andrology, EarlyView.
Abstract Background It is well‐established that spermatogenesis, semen quality, and reproductive hormones are interlinked. It is, however, less well‐described how various specific testicular histopathologies are linked to reproductive hormones and semen quality.
Gülizar Saritas, Nina Mørup, Trine H. Johannsen, Anders Juul, Lise Aksglaede, Sofia B. Winge, Kristian Almstrup   +6 more
wiley   +1 more source

Semen quality in patients with testicular cancer is associated with age and with greatly elevated levels of beta human chorionic gonadotropin

Andrology, EarlyView.
Abstract Background Poor semen quality is a well‐known feature in patients with testicular germ cell tumours (GCTs) at the time of diagnosis but the underlying biological reasons are incompletely understood. Objectives This study aimed to identify GCT‐specific clinical factors that are involved with poor semen quality in GCT patients.
Klaus‐Peter Dieckmann, Johanna Hochmuth‐Tisch, Andrea Salzbrunn, Cord Matthies, Kathrein von Kopylow, Marta Godlewska, Christian Wülfing, Uwe Pichlmeier, Armin Soave, Christian Guido Ruf   +9 more
wiley   +1 more source

Assessing the Impact of the Novel Sperm Selection Technique 'Annexin-V Coated Polystyrene Bead Technique' on Mouse Assisted Reproductive Techniques Outcomes: Preliminary Findings. [PDF]

Reprod Sci
Karabulut S, Camcı İY, Altun CE, Usta M, Yiğit P.   +4 more
europepmc   +1 more source

The role of iron in normal and impaired testicular function

Andrology, EarlyView.
Abstract Iron plays a critical role in testicular physiology, impacting spermatogenesis, testosterone production, and overall testicular function. Iron homeostasis is maintained through systemic and cellular regulatory mechanisms, including hepcidin‐mediated systemic iron control and the iron‐responsive element/iron regulatory protein (IRE/IRP) system ...
Aileen Harrer, Esther G. Meyron‐Holtz, Andreas Meinhardt   +2 more
wiley   +1 more source

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Machine learning for sperm selection

Nature Reviews Urology, 2021
Infertility rates and the number of couples seeking fertility care have increased worldwide over the past few decades. Over 2.5 million cycles of assisted reproductive technologies are being performed globally every year, but the success rate has remained at ~33%.
Jae Bem You, Christopher McCallum, Yihe Wang, Jason Riordon, Reza Nosrati, David Sinton   +5 more
openaire   +2 more sources

Sperm Selection Technology in ART

Seminars in Reproductive Medicine, 2021
AbstractIntracytoplasmic sperm injection (ICSI) is a commonly used in vitro fertilization technique. Selection of sperm for injection is currently done using subjective assessment of morphology, which may not accurately identify the best-quality sperm.
Catherine Martin, Emma Woodland
openaire   +2 more sources

An Ecology of Sperm: Sperm Diversification by Natural Selection

Annual Review of Ecology, Evolution, and Systematics, 2015
Using basic ecological concepts, we introduce sperm ecology as a framework to study sperm cells. First, we describe environmental effects on sperm and conclude that evolutionary and ecological research should not neglect the overwhelming evidence presented here (both in external and internal fertilizers and in terrestrial and aquatic habitats) that ...
Klaus Reinhardt, Jessica Abbott, Ralph Dobler   +2 more
exaly   +2 more sources

Sperm head's birefringence: a new criterion for sperm selection

Fertility and Sterility, 2008
To investigate the characteristics of birefringence in human sperm heads and apply polarization microscopy for sperm selection at intracytoplasmic sperm injection (ICSI).Prospective randomized study.Reproductive Medicine Unit, Società Italiana Studi Medicina della Riproduzione, Bologna, Italy.A total of 112 male patients had birefringent sperm selected
Luca Gianaroli, Elena Moretti, Giulia Collodel   +2 more
exaly   +5 more sources