Can Rh negative cause a false negative pregnancy test result?

Patient : My blood type is O negative. With my first child, I did not get a positive reading until I was 16 weeks; with my second child, I was 10 weeks; and with my third child, I was 12 and a half weeks. At the moment, I am 33 days late for menstruation, and I am still getting negative results on pregnancy tests. When it comes to my period, it is a 30 day cycle, very rarely irregular. I have not been on birth control for over a year. The only pharmaceuticals I use are albuterol, Excedrin Migraine and Ibuprofen. I don't smoke, I don't drink, I don't use illegal substances. I admit that I am overweight, but have been trying to lose weight over the past year (daily yoga, walking, changing diet to include more vegetables and less junk food). I am not bulimic, and I do not have any other health issues. In short, I do not know why I would consistently receive false negatives on a pregnancy test, nor do I know any other reason why my period would be so late. So, I was wondering if a negative Rh can cause false negative readings on store bought pregnancy tests?
Doctor :   This question is currently in queue and will be answered shortly by one of our doctors. In the meantime you may browse our library of answered questions by clicking here.

Related Q&A

Q: I have a full removal of the fallopian tubes for contraceptive purposes in May 2016. During that surgery, I also had ...

Q: Would I be diagnosed with cholestasis. Total bilirubin is 0.3 mg/dL, AST=15 u/l, bile acid=13.2 umol/L. Im 36 weeks 2...

Q: Our daughter is 26 weeks pregnant, the Dr. she went to (she is telling us) said that the baby is at a twelve week sta...

Q: I had my iud in for 3.5 yrs never had a period. Removed 12/12/16 never bleed still no period. Having pregnancy sympto...

Q: Recent blood test..??? Should I be concerned? WBC-17.1 High Reference (4-11) Neutrophils-77.4 High Reference (...


Dr. James Obaji M.D.

  • 247 Reviews
  • Family Physician

Dr. Suneel Sharman M.D.

  • 190 Reviews
  • Family Physician

Dr. Pat Golden M.D.

  • 169 Reviews
  • Cardiologist

Dr. Kunaal Jindal M.D.

  • 112 Reviews
  • Plastic Surgeon