Watching your pregnancy week by week is an exciting way to understand how your baby and body are developing. Your pregnancy is divided into pregnancy trimesters which all together make up your 40 weeks of pregnancy. Your pregnancy changes week by week, and understanding what happens at each week can help you to understand your pregnancy, your baby’s development and your body.
Your trimesters are divided by these pregnancy weeks, and when looking at your pregnancy week by week you will see 13 weeks in your 1st trimester and 2nd trimester, and 14 weeks in your 3rd trimester.
A normal or ‘term’ pregnancy typically lasts for 280 days, or if you are looking at your pregnancy week by week then it would be 40 weeks (which is roughly nine calendar months) and is calculated from the first day of your last menstrual period, or LMP. The reason for this is because the exact date of conception can be hard to pin down, although in women with regular four-weekly cycles, conception has usually occurred two weeks after your LMP. You’ll find that healthcare professionals refer to completed weeks of pregnancy. Again, they calculate this from the first day of your LMP. Pregnancy isn’t ‘one size fits all’. Every pregnancy is different, and your baby will develop at his/her own pace. Making regular antenatal visits, and talking to your healthcare professional will help to reassure, and to ensure that you and your baby get the care that you both need.
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