What’s happening with you
Your breasts continue to be tender and fuller – most women need a bra change to an increased cup size as well as the measurement around. For example, if you were a 34B, you will likely need a 36C. A properly fit and supportive bra will help you be more comfortable. Be careful in purchasing under-wire bras, because some women complain that they irritate later in pregnancy when the belly is bigger.
Your uterus grows to about the size of a grapefruit. And good news, the nausea associated with morning sickness should lessen, and your energy level may return to normal or even increase.
How you may feel
Most women start to notice a little bulge in their abdomen, and may find that their favorite pair of pants is snug around the zipper. With the growing fetus and expanding uterus, most women experience a 2-4 pound weight gain by the end of the third month.
You may feel more relaxed and tranquil. At the end of the third month, the first trimester is complete. You’ve adjusted to many hormonal and physical changes and your baby has experienced remarkable growth. Together, you have accomplished amazing things!
Many women, who’ve experienced morning sickness, find a significant improvement in their symptoms by the end of the third month. The risk and incidence of spontaneous miscarriage diminishes after this point. For some, especially those with a previous pregnancy loss, getting over the first trimester hurdle is a great relief.
Your heart has adjusted to pumping a higher volume of blood, and increased the number of beats/minute to the rate that will remain for the rest of a healthy pregnancy. While you may not notice it, the number of breaths you take in a minute also increases. This is nature’s way of ensuring that the increased blood supply will have increased oxygen available to nourish and supply energy to the rapidly growing fetus.
Dietary cravings and dislikes are quite common during your first six months. You may crave foods you've never liked before, and reject things you've previously enjoyed.
How baby is growing
The fetus has developed each body system, and will further mature these systems in the months to come. The kidneys are now functioning. Hair is growing. The fingers and toes are more prominent. Tooth buds are forming. The fetus is about 2-1/2 inches long and weighs a little more than an ounce.