If you've felt like you're asleep on your feet during the past three months, it's little wonder. Your rapidly growing baby has just made the progression from embryo to fetus! That means that your little guy or gal is just that...His or her genitals are beginning to show definitive signs of male or female gender. And your baby is bigger, as well. It's grown to about two and a half inches, or the length of a plum. Although that may sound small, it represents a doubling in size during this month alone! During this period, your baby will begin to move his or her arms and legs, but you won't feel these butterfly movements yet. You'll have to wait another two months or so for that! Bones and cartilage are forming inside your baby, and knees, ankles, and elbows are present now. In addition, teeth are developing under your child's gums, although they won't make an appearance until after birth. Guess what else? Your baby is producing urine, digestive juices, white blood cells, hormones and, if it's a boy, testosterone! During the last week of month three, your baby's body systems are almost completely formed. At this point, he or she will enter the maintenance phase, during which all of these systems will continue to mature and grow. While your baby is having a grand time growing, you're probably feeling the sleepy effects. That "drag-your-feet" feeling is a normal and frequent symptom of early pregnancy. The reason is simple: Growing a baby is hard work! While your metabolism and hormone levels have increased, your blood sugar and blood pressure have dropped...leaving you feeling like you ran a marathon. In addition, some of pregnancy's more awkward side effects are probably starting to show: Burping and passing gas. The pregnancy hormone progesterone relaxes the muscles in your digestive tract, allowing more time for nutrients to be absorbed. This slowed digestion is great for your baby, but may leave YOU feeling bloated and gassy. You may also experience bouts of dizziness, also due to progesterone. The hormone increases the blood flow to your baby, but slows the return of blood to you. This can lead to that light-headed feeling. You can often lessen dizziness by sitting with your head lowered between your knees while taking deep breaths. Once the feeling passes, have something to eat or drink. While dizziness and gassiness are no fun, you'll be happy to hear that the nausea, constant urination, and breast-tenderness that were with you in the beginning will usually start to abate by the end of month three. And you may have started to notice a slight rounding of your lower abdomen. After all, your uterus has now reached the size of a grapefruit and is rising up from the pelvis into this area! Congratulations! You've almost completed your first trimester. Your baby is now a fetus and you have 28 more weeks to grow and change together!