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.
Hereâs the most common breakdown, along with official weeks from the American Congress of Obstetricians and Gynecologists: First Trimester: 0 weeksâ13 and 6/7 weeks (Months 1â3) Starts with the first day of your last menstrual period (LMP) and ends with the last day of the 13th week thereafter. During your last period (which will be your last for a while), your uterus is preparing for ovulation and your body is gearing up for pregnancy, so technically, you can start counting from this point. Second Trimester: 14 and 0/7 weeksâ27 and 6/7 weeks (Months 4 â7) Starts at the beginning of the 14th week after your LMP and lasts through the 27th week of pregnancy. Third Trimester: 28 and 0/7 weeksâ 40 and 6/7 weeks (Months 7â9) Starts at the beginning of the 28th week after your LMP and ends with labor.