They become sore due to the changes going on within your breast - the production of milk.
Nipples will darken during pregnancy.
Yes, during the later part of pregnancy they will swell and become slightly red.
No the nipples do not change colors.
Maybe
Yes they usually gets darker during pregnancy and breastfeeding.
Generally not in the first week, because people don't usually get pregnancy symptoms until 2 weeks at the earliest. However, itchy boobs and nipples are common during pregnancy because the boobs are growing and stretching
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Yes, you can experience this during your cycle and during pregnancy.
during ovluation.
Headaches, tender or painful breasts and nipples are common signs of early pregnancy. Red, tender gums that bleed when you floss or brush are a sign of pregnancy gingivitis, found by about half of women during pregnancy it is caused by the increase in progesterone making your gums more sensitive to the bacteria in plaque and by the increase in the blood supply to your mouth.
Depends what you do with them and how sensitive she is. Some have soft nipples and others hard. Contrary to what many believe, the nipples does not have to be stiff when she is aroused.
In the first trimester