Is there such thing as healthy sperm in terms of creating healthy children, or is a man's sperm simply just sperm independent of external factors?

Best ones swim bettr: Men generate millions of sperm in a continuous process but external factors may effect a portion. Geneticists consider this one way males have less negative effect on a fetus than females when it comes to lifelong exposures to toxins/xrays/gamma radiation. The female releases one egg/time while the male donates millions of sperm. Thankfully the sperm likely to bring pregnancy is the least injured