I'm gonna use alterate names for things so it doesn't get automatically removed...
I'm assumimng this is talking about pull out or natural family planning (NFP) where you only hanky panky durring times of the month where the woman is least likely to be fertile.
NFP: Safe because it doesn't interfere with hormones or any of the body's functions. It relies on working around them. However, it's not reliable because the body isn't a clock. The egg can be released at different times from month to month and swimmers can live for up to 6 days.
Pull out: Safe because, again, it doesn't interfere with hormones. Unreliable because pre-___ can contain swimmers and it only takes one to fertalize. Men don't always time it right.
In research when a significant result is found that means it has been shown through statistical tests that one variable has had an effect on another. If it is a low effect size though it means that the effect is not large enough to prove a hypothesis.
D. It will inhibit the citric acid cycle and oxidative phosphorylation.
exchange of bodily fluids
blood transfer
airborne spread