Pregnancy Symptoms by Stage Guided by Dr OH So-young Early Pregnancy (up to 13 Weeks) No menstruation, Nipples darken, Constant tiredness, Possible severe morning sickness, Basal body temperature slightly higher. Mid-Pregnancy (14-27 Weeks) Baby movements felt, Belly grows, Pregnancy line appears on the belly, Less morning sickness, more appetite, weight gain, Sweating increases, breath shortens..