Sperm that don't swim well rank high among the main causes of infertility. To give these cells a boost, women trying to conceive can turn to artificial insemination or other assisted reproduction techniques, but success can ...
Bio & Medicine
Jan 13, 2016
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A discovery by Rutgers scientists links a protein in sperm to the same molecule needed for reproduction in tiny roundworms and provides clues to human infertility.
Cell & Microbiology
Dec 3, 2015
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In their arduous journey to the egg, sperm 'feel' the heat of the fallopian tube and 'taste' the chemical signals of the ova. But a new Weizmann Institute study published in Scientific Reports shows that sperm actually make ...
Cell & Microbiology
Nov 30, 2015
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A tiny fruit fly has the bizarre distinction of possessing the longest sperm of any animal—20 times the length of its own body and 1,000 times that of human sperm.
Plants & Animals
Nov 18, 2015
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A team of scientists in Sweden has broken open the genetic recipe for a human embryo's first three days of development, chronicling what happens in the crucial hours that follow the union of egg and sperm.
Biotechnology
Sep 4, 2015
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Men and women often enter relationships with different long-term goals. In the animal world, differences in approaches to reproductive success can lead to sexual conflict.
Plants & Animals
May 28, 2015
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New research in flies shows how cells in adult reproductive organs maintain their sexual identity. The study, publishing online on November 13 in the Cell Press journal Developmental Cell, also identified a mutation that ...
Cell & Microbiology
Nov 13, 2014
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Why do male animals need millions of sperms every day in order to reproduce? And why are there two sexes anyway? These and related questions are the topic of the latest issue of the research journal Molecular Human Reproduction ...
Plants & Animals
Oct 17, 2014
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Before it can fertilize an egg, a sperm has to bind to and bore through an outer egg layer known as the zona pellucida. Despite decades of research, some of the biological mechanisms behind this process remain unclear. A ...
Cell & Microbiology
Jun 16, 2014
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To better understand the causes of male infertility, a team of Bay Area researchers is exploring the factors, both physiological and biochemical, that differentiate fertile sperm from infertile sperm. At the 58th Annual Biophysical ...
Biochemistry
Feb 18, 2014
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