What is a better way of blood collection for ELISA assay for hormones ( AMH, LH, FSH, estradiol) plasma or serum?

I want to measure hormones ( AMH, LH, FSH, estradiol) in blood samples from rat. Which one of the blood collection techniques are better for this kind of annalysis? Assays I am using don't specify...

03 March 2019 5,182 6 View