Now, one way to do the statistics would be to do an ANOVA with repeated measurements and just compare the averages from time 1 to time 6. But I would prefer to calculate a trend with time analysis. Is this even possible with only 6 times of measurement? And if it is, does anyone have an idea how to do it in R? Or does anyone have an article that explains this, or knows about a similar experiment? I am grateful for every help, I really am lost.

Thank you!