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.
Pregnancy can be broken down into days, weeks, months and trimesters. Day 1 marks the beginning of week 1 of pregnancy, month 1 of pregnancy, and the start of the first trimester. A baby is conceived during week 3 of pregnancy. Day 15 marks the beginning of the week 3. The average pregnancy is 280 days long. Another way to talk about the days and weeks of pregnancy is to combine the two units of measurement. Week 1 of pregnancy begins on 0 weeks 1 day and ends on 1 week 0 days of pregnancy. Week 2 of pregnancy encompasses the time between 1 week 1 day and 2 weeks 0 days of pregnancy.