Navigation Links
Medicine residues may threaten fish reproduction

Researchers at Ume University and the Sahlgrenska Academy at the University of Gothenburg, Sweden, have discovered that traces of many medicines can be found in fish that have been swimming in treated waste water. One such medicine, the hormone levonorgestrel, was found in higher concentrations in the blood of fish than in women who take the contraceptive pill. Elevated levels of this hormone can lead to infertility in fish.

The study is published in the journal Environmental Science and Technology. The fish in the study were exposed to treated waste water from three sewage treatment works in Stockholm, Ume and Gothenburg. The study shows that levonorgestrel which is found in many contraceptive pills, including the morning-after pill can impact on the environment and constitutes a risk factor for the ability of fish to reproduce. Levonogestrel is designed to mimic the female sex hormone progesterone and is produced synthetically.

A study from Germany showed very recently that less than a billionth of a gram of levonorgestrel per litre inhibited the reproduction of fish in aquarium-based trials.
"We are finding these levels in treated waste water in Sweden," explains Jerker Fick at the Department of Chemistry at Ume University.

For around ten years it has been known that synthetic oestrogen from contraceptive pills can affect fish that live downstream from sewage treatment works. The new study shows that synthetic progesterone-like hormones in contraceptive pills also carry risks.

The fish in the study were exposed to undiluted waste water, whilst in the natural environment there tends to be a degree of dilution in watercourses. But the study pointed out that there are also watercourses with very little dilution, and probably treatment plants that filter out the hormone less effectively than those included in the study. These findings will help to improve our understanding of which substances need to be removed from waste water.

"If we know how our medicines affect the environment, we will be in a better position to choose environmentally friendly alternatives, though we must always put the health of patients first," says Joakim Larsson at the Sahlgrenska Academy, one of the researchers behind the study.


Contact: Joakim Larsson
University of Gothenburg

Related biology news :

1. New research seeks to enhance quality and security of wireless telemedicine
2. Penn Veterinary Medicine report new strategy to create genetically-modified animals
3. SNM applauds NAS study showing need to restore federal nuclear medicine research funding
4. Gene-targeting pioneer Mario Capecchi shares 2007 Nobel Prize in Medicine
5. Professor Sir Martin Evans wins Nobel Prize for Medicine
6. 3 Columbia University Medical Center faculty elected to Institute of Medicine
7. In the laboratory, green tea proves a powerful medicine against severe sepsis
8. Telemedicine: Health alert via satellite
9. Study of African traditional medicine will begin world-first clinical trial
10. CWRU School of Medicine has evidence vaccine against malaria will reduce disease
11. New clinical trial results show how personalized medicine will alter treatment of genetic disorders
Post Your Comments:
(Date:11/17/2015)... Paris from 17 th until 19 ... from 17 th until 19 th November 2015. ... invented the first combined scanner in the world which scans ... now two different scanners were required: one for passports and ... the same surface. This innovation is an ideal solution for ...
(Date:11/12/2015)... , Nov. 12, 2015  A golden retriever ... Duchenne muscular dystrophy (DMD) has provided a new lead ... Children,s Hospital, the Broad Institute of MIT and Harvard ... Brazil . Cell, pinpoints ... dogs "escape" the disease,s effects. The Boston Children,s lab ...
(Date:11/10/2015)... 10, 2015 About signature ... helps to identify and verify the identity of ... as the secure and accurate method of authentication ... particular individual because each individual,s signature is highly ... when dynamic signature of an individual is compared ...
Breaking Biology News(10 mins):
(Date:11/25/2015)... , November 25, 2015 2 ... première fois les différences entre les souches bactériennes ... celles des êtres humains . Ces recherches ... et envisager la prise en charge efficace de ... diagnostiqués chez les chats .    --> ...
(Date:11/25/2015)... CITY , Nov. 25, 2015 /PRNewswire/ - Aeterna ... affirms that its business and prospects remain fundamentally ... , Zoptrex™ (zoptarelin doxorubicin) recently received DSMB recommendation ... to completion following review of the final interim ... Phase 2 Primary Endpoint in men with heavily ...
(Date:11/25/2015)... CA (PRWEB) , ... November 25, 2015 , ... ... genomics company uBiome, were featured on AngelList early in their initial angel funding ... an AngelList syndicate for individuals looking to make early stage investments in the ...
(Date:11/24/2015)... Therapeutics, Inc. (NASDAQ: HALO ) will be presenting at the ... on Wednesday, December 2 at 9:30 a.m. ET/6:30 a.m. PT . ... a corporate overview. th Annual Oppenheimer Healthcare Conference ... a.m. PT . Jim Mazzola , vice president of ... --> th Annual Oppenheimer Healthcare Conference in ...
Breaking Biology Technology: