My speculation (and I'm no medical-field professional) is that my body didn't respond to the hhCG drops as it should have - just based on my personal history. I had a miscarriage at age 21. Followed by a premature birth at age 23. And my last pregnancy was carried past-term with the assistance of hormone therapy at age 25. If I'm understanding hhCG correctly (please, correct me if I'm wrong), it works by stimulating your body to produce hCG. If my body is not efficient at this production (based on my fertility history) - would I do best on injections? So I KNOW the right amount of hCG is in my system? Also - if I plan to quit the drops - do I continue them to the minimum 23 days (even though I have uncontrollable cravings and hunger and continue to gain) while I wait for the Rx hCG to arrive?