Tingling, swollen, or tender breasts can occur in only a few days after conception. However, theses symptoms may be the result of birth control pills or an impending menstruation. Changes in the color of vaginal and cervical tissue occurs in the first trimester, but this can also be due to impending menstruation. Darkening or the area around the nipple and the elevation of the tiny glands around the nipple occurs in the first trimester, but this may be caused by hormonal imbalance or the effect of a prior pregnancy. Blue and pink lines under the skin of the breasts and abdomen occur in the first trimester, but may also be the result of hormonal imbalance or a prior pregnancy.
Food cravings begin in the first trimester.
These may also be the result of an inadequate diet, stress, imagination, or impending menstruation. Darkening of the line from the navel to the pubis occurs in the fourth or fifth month, but may be caused from hormonal imbalance or the effect of a prior pregnancy. The uterus and cervix will soften 2 to 8 weeks after conception, but this may be due to a delayed menstrual period. The uterus and abdomen will enlarge in 8 to 12 weeks after conception, but this may be due to a tumor or fibroids. Intermittent painless contractions occur early in a pregnancy, increasing in frequency as the pregnancy advances, or they may be bowel contractions.