I've read a few posts on how pulling can affect a womans menstrual cycle. My 14 year old daughter has been very curious about my pulling and she wanted to try it. She pulled with VCO for about 20 minutes. A few hours later she called me into her bedroom to let me know her VERY FIRST menstrual cycle had just started. I can't help but wonder if the pulling induced her cycle to start? Or was it just a coincidence? I guess I'll never know for sure. Old posts I've read indicate that some woman have noticeable changes in their cycles. My daughter has not asked to pull again.