According to "Yoga Journal," expectant mothers should participate in a gentle yoga practice, or none at all, during the first trimester. This trimester is when the fetus is still implanting itself into the uterus, and, therefore, strenuous yoga poses should be avoided to prevent miscarriage.

From conception to birth the development of a baby follows a predictable path. As cells divide and differentiate, the developing baby begins as a zygote, forms into a blastocyst, becomes an embryo and then transforms into a fetus, all in the first trimester of pregnancy.

Understand the different types of ultrasounds used during pregnancy, including standard, transvaginal, fetal echocardiography and 3-D ultrasounds. Learn about their purposes and when they are typically performed.

A Neti pot is a tool used for sinus irrigation. This technique is one of the oldest and most researched forms of treating sinus issues such as infections, allergies and headaches, according to Jalanetipot.com.

One common early sign of pregnancy is a metallic taste in the mouth. Some women feel as though they're chewing on aluminum foil, while to others, it seems that they have a penny tucked in their cheek.

Before babies are born, they sleep, practice breathing, swallow and even suck their thumbs--in other words, act like babies. During their time in the womb, babies receive many types of stimuli from the outside world, including tastes, sounds and they can even perceive light.

As an expectant mom, one of your early concerns during the first trimester will be, 'When can I hear my baby's heartbeat?' In previous decades, a stethoscope-like device was the only available tool, and only the doctor could actually hear the heartbeat.

Boy or girl? It's perhaps the most common question asked of pregnant women, and many a pregnant woman looks forward to learning the sex of her baby with almost as much anticipation as her due date.

Manufacturers rely on chlorine bleach to whiten paper pulp and other materials during the production process. Chlorine bleach also plays an important role in wastewater treatment, and is used in many household cleaning products.

Women's bodies change significantly during pregnancy. Because the growing baby is in the pelvic cavity and also has to pass through the pelvis during delivery, many of these changes are localized to the pelvis. Women experience a variety of sensations during pregnancy, which may include pelvic discomfort or burning.

Most women have no trouble packing on pounds over the course of their pregnancy. Extra food and calories give your baby the nutrients he needs to grow and allow you to build fat stores for breast feeding.

After you give birth, you’ll enter the postpartum time, which lasts approximately six weeks, according to the Cigna website. During postpartum, your body gradually returns to its prepregnancy state. Eventually, your periods will resume, too.