Nanobot

Nanobots are Robots that carry out a very specific function and are ~50–100 nm wide. They can be used very effectively for drug delivery. Normally, drugs work through the entire body before they reach the disease-affected area

A nanobot picks up a sperm by the tail and inseminates an egg with it, by the German Institute for Integrative Nanosciences. ... https://twitter.com/fasc1nate/status/1628153445470314498