Results 61 to 70 of about 504,977 (225)
Male scorpionflies assess the amount of rival sperm transferred by females' previous mates [PDF]
, 2007 Engqvist L. Male scorpionflies assess the amount of rival sperm transferred by females' previous mates. Evolution. 2007;61(6):1489-1494.Theory predicts that when sperm compete numerically, selection will favor males who vary the number of sperm they ...
Engqvist, Leif ; https://orcid.org/
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Advanced Science, EarlyView.This study established a one‐step method inducing pro‐spermatogonia‐like (activating SOX17) and oogonia‐like (activating SOX17/TFAP2C) cells from porcine pgEpiSCs with a NANOS3‐tdTomato reporter. EGF activates the core PGC program and supports survival; BMP4 further induces NANOS3 and DDX4 expression; IWR1 enhances PGCLC efficiency by suppressing ...
Pengcheng He +14 more
wiley +1 more source
Micro-TESE Outcomes for Non-Obstructive Azoospermia — The First Australian Series
Fertility & Reproduction, 2022 Background: Micro-dissection testicular sperm extraction (micro-TESE) for non-obstructive azoospermia (NOA) was shown to achieve the best sperm retrieval rate (SRR) compared to other techniques.
Daniel LANTSBERG +2 more
doaj +1 more source
Hypothalamic POMC Neurons Gate the Fear‐Feeding Trade‐Off
Advanced Science, EarlyView.Hungry animals must continually arbitrate between feeding and defensive behaviors when confronted with potential threats. We show that hypothalamic POMC neurons engage CRH‐expressing stress circuits and downstream hormonal responses to coordinate this behavioral selection between competing behaviors.
Cristina Miralpeix +16 more
wiley +1 more source
, 1997 PURPOSE: We determined the prevalence of requests for postmortem sperm procurement and the degree to which procurement is performed by those working in the field of infertility.
O'Neill, Kathryn +5 more
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Single‐Nucleus RNA Sequencing Identifies CREM as a Brake on Myofiber Hypertrophy in Chickens
Advanced Science, EarlyView.Single‐nucleus RNA sequencing on 91 144 nuclei from postnatal chicken pectoralis major between fast‐growing broilers (FG) and slow‐growing layers (SG) identifies the transcriptional factor CREM as a novel brake of myofiber hypertrophy. Mechanistically, functional validation experiments confirm that CREM activates the promoter of JUN and CREM deletion ...
Shuang Gu +12 more
wiley +1 more source
Haseki Tıp Bülteni, 2020 Aim:To investigate the likelihood of sperm retrieval in repeated micro-testicular sperm extraction (micro-TESE) in non-obstructive azoospermia (NOA) patients.Methods:Data of 310 patients, who underwent a micro-TESE procedure at a center experienced in in
Alkan Çubuk +2 more
doaj +1 more source
Determinants of sperm transfer in the scorpionfly Panorpa cognata: male variation, female condition and copulation duration [PDF]
, 2003 Engqvist L, Sauer KP. Determinants of sperm transfer in the scorpionfly Panorpa cognata: male variation, female condition and copulation duration. Journal of Evolutionary Biology.
Sauer, Klaus Peter +1 more
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The Anatomical Record, EarlyView.Abstract The organization and function of reptilian excurrent ducts remain poorly characterized, particularly in Neotropical snakes. We provide the first integrative morphological, histochemical, immunohistochemical, and ultrastructural analysis of the proximal post‐testicular ducts of Crotalus durissus across reproductive stages.
Flávia Cappuccio de Resende +9 more
wiley +1 more source
Journal of Urological Surgery, 2016 In contemporary medicine, testicular sperm extraction (TESE) and using testicular sperm for intracytoplasmic injection is the only fertility treatment in men with nonobstructive azoospermia (NOA).
Bernie AM, Mata DA, Ramasamy R
doaj +1 more source