As per a research published in the journal Human Reproduction, it has been revealed that obesity, smoking and drinking have no effect on male sperm quality. The research was taken out by a group of researchers from the University of Manchester in the UK.

The study researchers said that by saying that the above mentioned factors have no effect on sperm quality does not mean that they are good for health. It will be better that men refrain from such things.

Out of around 250 million individuals estimated to be attempting parenthood at any given time, 13 to 19 million couples are likely to be infertile.Although the national census does not head count infertile couples, this study, which takes into account the national census reports of the past three decades, viz, 2001, 1991 and 1981, showed that infertility has risen by 50 percent in the country.

Global fertility rates are in general decline and this trend is most pronounced in industrialized countries, especially Western Europe, where populations are projected to decline dramatically over the next 50 years. Even in India the TFR over decade has declined drastically.