How Long After Injecting Test is Sperm Count Affected?

I have a normal/healthy sperm count. Starting 100mg Cypionate every 7 days. How long after my very first injection will my sperm count be affected? Is it the next day or does it take weeks/months?

LH/FSH will be very low in a couple of days. From there, its really about how your boys respond to that. Some can feel a dull ache 24x7 that tells you something is not right. When hCG is used, fertility can be expected to be preserved. Some babies ‘here’ can testify to that.