EXCAVATOR are heavy construction equipment consisting of a boom, stick, bucket and cab on a rotating platform (known as the house). The house sits atop an undercarriage with â¦ tracks or wheels. A cable-operated excavator uses winches and steel ropes to accomplish the movements.
First Trimester (0 to 13 Weeks). The first trimester is the most crucial to your baby's development. During this period, your baby's body structure and organ systems develop. Most miscarriages and birth defects occur during this period. Your body also undergoes major changes during the first trimester. These changes often cause a variety of symptoms, including nausea, fatigue, breast tenderness and frequent urination. Although these are common pregnancy symptoms, every woman has a different experience.
The First Trimester (Weeks 1-13) The first trimester is typically the shortest for you, because the first 3-4 weeks or more of your pregnancy, you do not even know you are pregnant. In fact, weeks 1-2 are the week of your last normal menstrual period, and when you ovulate. Most mothers won't be able to take a pregnancy test until around week four, and some are even later than that. This first trimester sees an incredible shift in your baby.