12 days after ovulation stomach right in the middle of the pinch feeling is not necessarily implantation, may also be gynecological inflammation, gastrointestinal diseases and other causes. Most women do not feel when the fertilized egg is implanted after pregnancy, and there may be a very small number of people who will experience a small amount of vaginal bleeding, abdominal pain and other symptoms, but this is not a specific symptom, whether it is implantation. Still need to check the blood HCG after menopause, if it is determined to be pregnancy, and at the same time to exclude the effects of other diseases, it may be the pain of implantation. 12 days after ovulation stomach right in the middle of the pins and needles feeling, accompanied by increased vaginal discharge, may also be pelvic inflammatory disease, endometritis and other gynecological inflammation caused. If accompanied by nausea, diarrhea and other discomforts, it may be caused by gastrointestinal diseases and so on. If you have abdominal pain, you need to consult a doctor for examination, to clarify the cause of the disease, and to be treated under the guidance of the doctor.