Negative pregnancy test and breastfeeding: any correlation
No. If you are pregnant, breastfeeding will not affect your pregnancy test. When you are pregnant your body rapidly makes HCG, the pregnancy hormone. Breastfeeding will not affect the amount of HCG in your system. Breastfeeding affects other hormone levels in your body such as estrogen and progesterone but not HCG. A pregnancy test is positive if HCG is detected in your urine.