The First Trimester of Pregnancy

The first three months of pregnancy are an exciting time. Your baby goes from the meeting of an egg no bigger than a grain of sand and an even smaller sperm, to a tiny person only 2.5 inches long and weighing about half an ounce. In spite of her small size, by the end of the first trimester, your baby has a fully formed and beating heart, a complete spine and spinal cord, arms, legs, eyelids, a nose, ears, and the beginnings of fingers and toes. The major organs and systems of her body are already beginning to work.

You won’t be able to feel your baby moving yet, but he is already making his presence known by the changes going on in your body. You’ll notice changes in your emotions, your sleep (and how tired you are!), your appetite, your bathroom habits, and more. You may notice morning sickness (though it can happen any time of the day). Don’t worry, though, most women find these symptoms lessen by the 2nd trimester.

These photos show the progression of your baby from the beginning of cell division at fertilization through the end of the 1st Trimester at 13 weeks.

Fertilzed Egg Beginning Cell Division

Fertilzed Egg Beginning Cell Division

Embryo Implanted in Uterus

Embryo Implanted in Uterus

Baby at 3-4 Weeks

Baby at 3-4 Weeks

Baby at About 6 Weeks

Baby at About 6 Weeks

Baby at 9 Weeks

Baby at 9 Weeks

Baby at 13 Weeks

Baby at 13 Weeks

Pregnancy is a miraculous and exciting time. You will likely feel a wide range of emotions from surprise to joy, to fear, and back to excitement. At the Salida Pregnancy and Family Center, we have a variety of information and resources to help you learn more about pregnancy and parenting. We welcome you to visit our center at 215 E. 3rd Street in Salida, CO, or you can call us at (719)539-7436 for more information or to schedule a meeting with a trained peer counselor.