21 weeks pregnant what month: Determining Your Pregnancy Month

Wondering what month you're in at 21 weeks pregnant? At 21 weeks pregnant, you are in your fifth month of pregnancy. While many people consider the first trimester to be the first three months and the second trimester to be the next three months, the fifth month of pregnancy falls within the second trimester. This is because a pregnancy is typically calculated from the first day of your last menstrual period (LMP), not from the date of conception.
At 21 weeks pregnant, you've passed the first trimester, a period often marked by morning sickness and fatigue. Now, you're entering the second trimester, often referred to as the "honeymoon phase" of pregnancy. This period is usually characterized by more energy and less morning sickness, making it a time for enjoying the blossoming life within you. You'll likely start feeling your baby's movements more regularly, bringing a new wave of excitement and connection to your pregnancy. You'll also notice physical changes, including a growing belly and breast size.