so if you we are talking about esterified hormones.
a friend of mine, has a rude decease of bones, he's on nandrolone decanoate, and the nurse which makes his injection makes it ONLY in the morning.
i asked why, she said the BP is always high in the morning, then the hormones will be brought faster and easyer, in the whole body. Plus the metabolism is always more active in the morning.
i think morning it better, and it's what i do. IMHO.
( plus, the rebuild of muscle will not be better if you inject esterified drug before bed, you were kidding, right?)