There has been increasing evidence on the global decline in human sperm quality over the past few decades. In the most recent report, an international study group performed a systematic analysis of the current trends in sperm counts. This comprehensive study involved 42,935 men with semen samples spanning over 40 years. They reported a significant decline of 50– 60% in sperm counts amongst men from North America, Europe, Australia, and New Zealand. This latest finding has sparked even greater concern over the reasons behind the apparent decline in the sperm count of Western men.
1. Prickling, tingling nipples
As pregnancy hormones increase the blood supply to your breasts, you may feel a tingling sensation around your nipples.
This can be one of the earliest symptoms of pregnancy, and is sometimes noticeable within a week or so of conception. Once your body gets used to the hormone surge, this sensation will subside.