What are side effects of hcg drops on female? I recently read about a woman who was on birth control pills and didn’t have any spotting. On hcg diet, she noticed spotting and had a full fledged menstruation. Has any one else suffered from such an issue? I am a woman in my 30’s trying to lose some weight and this is what I found out…I fear of any drastic side effects. I request you to share your experience as it would help someone.