Tagged: sperm

Is it a shrimp? Is it a prawn? No – it’s Super Crayfish! - BioBlog

Alison Campbell Feb 12, 2018

Polyploidy – the duplication of chromosome sets – is relatively common in plants, and can result in the development of new species. (Many modern food crops are polyploids.) It’s much less common in animals, although found in some frogs and salamanders (amphibians) and leeches (annelids). So it was with a mix of excitement, surprise, and alarm that … Read More

Promising male birth control pill has its origin in an arrow poison - Guest Work

Guest Author Jan 31, 2018

Gunda Georg, University of Minnesota; Jon Hawkinson, University of Minnesota, and Shameem Syeda, University of Minnesota This article was originally published on The Conversation. Read the original article. After decades of research, development of a male birth control may now be one step closer. My colleagues and I are working on a … Read More

Huge drop in men’s sperm levels confirmed by new study – here are the facts - Guest Work

Guest Author Jul 31, 2017

By Chris Barratt, University of Dundee Sperm count in men from North America, Europe, Australia and New Zealand declined by 50-60% between 1973 and 2011, according to a new study from the Hebrew University of Jerusalem. Surprisingly, the study, which analysed data on the sperm counts of 42,935 men, found no decline in sperm counts … Read More

Why the male ‘pill’ is still so hard to swallow - Guest Work

Guest Author Nov 07, 2016

By Adam Watkins, Aston University A recent study looking at the effectiveness of a male contraceptive injection was abandoned after the men taking part reported increased incidences of acne (nearly half), mood disorders (over a fifth) and raised libido (over a third). In fact, there were 320 men in the study – and a total of 1,491 adverse … Read More

Sperm donation and incentives in New Zealand - The Dismal Science

Eric Crampton Sep 16, 2016

Here’s the Adam Smith Institute on New Zealand’s sperm shortage: The world simply will not make sense if you do not grasp the first and most basic thing you must know about economics. Which is that incentives matter. What the incentive is, what the action or activity is, those are things which can all vary wildly. Whether something acts … Read More