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Latest Fertilisation Stories

2014-07-29 23:02:29

In a new study, researchers mated worms of different species and found that the females’ lifespans and number of offspring were drastically reduced compared with females mated with the same species, and cross-species-mated females were often sterile. The researchers showed that the “foreign” sperm had broken from the female’s uterus, prematurely fertilized the eggs and destroyed the ovaries (causing no viable offspring and sterility), and traveled throughout the worm’s body...

Flower Development In 3D
2014-07-14 03:36:22

University of Vienna In close collaboration with Jürg Schönenberger and Yannick Städler from the Department of Botany and Biodiversity Research of the Faculty of Life Sciences, University of Vienna, 14 developmental stages of the flower of Arabidopsis thaliana from very early meristematic floral initiation to fully developed seeds were monitored with micro-computed tomography in 3D. From the same set of developmental stages a full metabolic profile using mass spectrometry was measured...

Size And Shape Of Sperm In Young Men Affected By Cannabis Use
2014-06-05 03:48:01

University of Sheffield World's largest study investigating how lifestyle affects sperm Young men who use cannabis may be putting their fertility at risk by inadvertently affecting the size and shape of their sperm according to research published today (Thursday 5 June 2014). In the world's largest study to investigate how common lifestyle factors influence the size and shape of sperm (referred to as sperm morphology), a research team from the Universities of Sheffield and Manchester...

2014-05-13 11:44:47

European Molecular Biology Organization A plethora of endocrine-disrupting chemicals interfere with human sperm function in a way that may have a negative impact on fertilization. These are the findings of a German - Danish team of researchers from the Center of Advanced European Studies and Research in Bonn, Germany, and the University Department of Growth and Reproduction, Rigshospitalet, Copenhagen, Denmark. The work, which is published in EMBO reports, suggests that endocrine...

2014-04-08 11:41:02

Researchers have discovered a way of reducing the fertility of malaria-carrying mosquitoes, potentially providing a new tactic to combat the disease. Anopheles gambiae mosquitoes are the main transmitters of malaria, which affects around 200 million people every year. The females mate only once during their lives. They store the sperm from this single mating in an organ called the spermatheca, from which they repeatedly take sperm over the course of their lifetime to fertilize the eggs...

2014-02-14 08:25:59

Sperm meet egg NEW YORK, February 14, 2014 /PRNewswire/ -- Pressure to make Valentine's Day all about sex and passion can feel daunting for 1 in 10 women in the US who face difficulty conceiving. Moreover, over the last three decades, women have been waiting longer to start having children. However, when it comes to fertility, age matters; both women and men are at their most fertile in their early twenties. "Over recent years, establishing a career, getting on the...

Spermbots Remotely Controlled By Magnetic Fields
2013-12-15 05:41:05

Brett Smith for redOrbit.com - Your Universe Online A team of German scientists has developed a sperm-based system that could aid in fertilization and drug delivery, according to a new study published in the journal Advanced Materials. New Scientist reports that the system involves placing a bull sperm inside a nanotube. The scientists are then able to remotely control the movements of the sperm using magnetic fields. The speed of the sperm can be controlled be changing the temperature...

Two Y Genes Can Replace Entire Y Chromosome For Assisted Reproduction In Mice
2013-11-21 15:33:20

University of Hawaii at Manoa The Y chromosome is a symbol of maleness, present only in males and encoding genes important for male reproduction. But live mouse offspring can be generated with assisted reproduction using germ cells from males with the Y chromosome contribution limited to only two genes: the testis determinant factor Sry and the spermatogonial proliferation factor Eif2s3y. "Does this mean that the Y chromosome (or most of it) is no longer needed? Yes, given our current...

2013-04-30 10:32:23

Sperm cell release can be triggered by tightening the grip around the delivery organ, according to a team of nano and microsystems engineers and plant biologists at the University of Montreal and Concordia University. Concordia's nanobiotech team devised a microchip that enabled the University of Montreal biologists to observe what happened when pollen tubes — the sperm delivery tools used by plants — tried to negotiate a microscopic obstacle course. The pollen tubes were exposed...

2013-04-24 16:40:10

Plasma protein fetuin-B regulates hardening of the zona pellucida and thus ensures the fertilization capacity of the ovum Scientists in Mainz and Aachen have discovered a new mechanism that controls egg cell fertility and that might have future therapeutic potential. It was revealed by Professor Dr. Walter Stöcker of the Institute of Zoology at Johannes Gutenberg University Mainz (JGU) that the blood protein fetuin-B plays an important and previously unknown role in the...


Word of the Day
ramage
  • Boughs or branches.
  • Warbling of birds in trees.
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