Relax the muscles. Tighten and relax the muscles several times a day. The mammary glands enlarge causing the breasts to swell and become tender in preparation for breastfeeding. This is due to an increased amount of the hormones estrogen and progesterone. A supportive bra should be worn.
Veins become more prominent on the surface of the breasts.
The uterus is growing and begins to press on the woman's bladder. This and increased blood flow to the kidneys may increase the need for her to urinate more frequently. However, morning sickness does not necessarily occur just in the morning and rarely interferes with proper maternal and fetal nutrition. Constipation may occur because of hormonal effects on smooth muscle. The muscular contractions in the intestines, which help to move food through the digestive tract, are slowed due to high levels of progesterone.