Weeks of pregnancy are counted from the first day of the last menstrual period. Pregnancy typically lasts around 40 weeks or 10 months, and it is divided into three trimesters.
The first trimester is from weeks 1-12 and is a time of rapid development for the fetus. During this time, the baby's vital organs and systems are formed, and the mother may experience morning sickness, fatigue and mood changes.
The second trimester is from weeks 13-28, and this is often considered the "honeymoon" period of pregnancy, as many women feel more energized and less nauseous. The fetus continues to develop and grow, and the mother may start to feel the baby move.
The third trimester is from weeks 29-40, and it is a time when the baby is preparing for birth and the mother's body is preparing for delivery. Many women experience increased fatigue and discomfort due to the baby's growth, and may experience Braxton Hicks contractions.
It's important to note that due date can change throughout the pregnancy based on ultrasound measurements and other factors, and not all pregnancies last exactly 40 weeks. It's essential to keep regular prenatal visits and consult with your healthcare provider for personalized information and guidance.