Most women want and expect to have children. But women who have a chronic health condition such as polycystic ovary syndrome (PCOS) often have concerns about childbearing, including whether they can become pregnant.
Feb 8, 2019
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A team of researchers from Denmark and France has found that taking regular doses of the pain reliever ibuprofen over a long period of time can lead to a disorder in men called compensated hypogonadism. In their paper published ...
Women using fertility drugs who did not conceive a 10-plus week pregnancy were at a statistically significant reduced risk of breast cancer compared to nonusers; however, women using the drugs who conceived a 10-plus week ...
Jul 6, 2012
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Taking paracetamol during pregnancy may impair the future fertility of female offspring, according to a review published in Endocrine Connections. The article reviews three separate rodent studies that all report altered ...
Jan 5, 2018
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An Indian woman who gave birth at the age of 70 said Tuesday she was not too old to become a first-time mother, adding that her life was now complete.
May 10, 2016
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There has been a lot of alarm in recent years about the declining fertility rates of Western men and the potential problems this may pose.
Nov 1, 2017
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The first national report into the cumulative success of IVF has shown there is little chance of pregnancy after the fifth round of treatment, regardless of a woman's age.
Aug 30, 2013
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The world is approaching a low-fertility future. Although by 2100 more than 97% of countries and territories will have fertility rates below what is necessary to sustain population size over time, comparatively high fertility ...
Mar 20, 2024
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(Medical Xpress)—In a truly odd study undertaken by a group of OB/GYN researchers in Italy, volunteer women were judged to determine if a medical condition known as endometriosis causes those afflicted to be viewed as more ...
Reproductive hormones control a woman's monthly cycle and regulate fertility. Reproductive hormones are also related to how attractive a woman smells a study now shows. Researchers at the University of Bern demonstrate that ...
Sep 12, 2018
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Fertilizer (or fertiliser) is any organic or inorganic material of natural or synthetic origin (other than liming materials) that is added to a soil to supply one or more plant nutrients essential to the growth of plants. A recent assessment found that about 40 to 60% of crop yields are attributable to commercial fertilizer use.
Mined inorganic fertilizers have been used for many centuries, whereas chemically synthesized inorganic fertilizers were only widely developed during the industrial revolution. Increased understanding and use of fertilizers were important parts of the pre-industrial British Agricultural Revolution and the industrial Green Revolution of the 20th century.
Inorganic fertilizer use has also significantly supported global population growth — it has been estimated that almost half the people on the Earth are currently fed as a result of synthetic nitrogen fertilizer use.
Fertilizers typically provide, in varying proportions:
The macronutrients are consumed in larger quantities and are present in plant tissue in quantities from 0.15% to 6.0% on a dry matter (0% moisture) basis (DM). Micronutrients are consumed in smaller quantities and are present in plant tissue on the order of parts per million (ppm), ranging from 0.15 to 400 ppm DM, or less than 0.04% DM.
Only three other macronutrients are required by all plants: carbon, hydrogen, and oxygen. These nutrients are supplied by water and carbon dioxide.
The nitrogen-rich fertilizer ammonium nitrate is also used as an oxidizing agent in improvised explosive devices, sometimes called fertilizer bombs, leading to sale regulations[citation needed].
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