Amid severe pollution in Delhi-NCR, consultant urologist at Noida's Kailash Hospital, Dr Parteek Maheshwari, said, "Testicles are very sensitive to environmental changes." He added, "Pollutants like PM2.5, PM10, sulphur dioxide, ozone, heavy metals...cause stress inside testes." Dr Maheshwari said pollution may lead to low sperm count, abnormal sperm shape and weaker motility.