Open air will not immediately kill them. They’ll dry out pretty fast though, without a source of moisture.
When zygotes are produced by IVF, they are not implanted until several days afterwards – in fact, they are usually allowed to perform the first few divisions first – mainly because survival rates are very low, and you don’t want to give it to the mother until you’re as confident as possible that it will continue to grow. However, they’re normally kept under special conditions in liquid culture, not in the open air.
While sperm can survive in the male reproductive tract several weeks, but in the semen of after ejaculation at most only live in 24 to 72 hours. But if the temperature drop, semen can be stored a few weeks; If use liquid nitrogen freezing, long-term sperm or even to preserve. Sperm survive conditions of temperature is very strict. Only less than body temperature (testicular temperature within the human body temperature below average commonly) was able to survive. General sperm in vitro survive very short time, in 15 to 30 minutes