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Q: Why do pregnancy trimesters vary in week lengths?
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What are trimesters in pregnancy?

There are three trimesters. The first trimester is the first stage of pregnancy from conception to 12 weeks The second trimester is the 13th week to the 28th week The third trimester is from the 28th week to the birth of the baby.


What are the differences between Pregnancy First second and third trimesters?

Pregnancy is divided into three trimesters.The first trimester is from the first week to the 13th week.The second is from week 14 to 27. The third and final trimester is from week 28 to the end of your pregnancy (about 40 weeks)


How long does pregnancy last and how is the pregnancy divided?

Pregnancy lasts about 40 weeks and is divided into 3 trimesters, which are about 12-14 weeks long each. The first trimester ends around week 13, the second ends around week 26, and the third trimester ends anywhere between week 38 and 42, depending on when the baby is born.


What are the stages of pregnancy?

First trimester: 1-12 weeks of pregnancySecond trimester: 13-27 weeks of pregnancyThird trimester: 28-40+ weeks of pregnancyThere are three stages of pregnancy which are divided into trimesters. The first trimester covers week 1 to week 12, the second trimester covers week 13 to week 28 and the final trimester covers week 29 to week 40.


What month can the baby hear you?

The babies heart beat develops at the fifth week of pregnancy. By the 12th week of pregnancy, you may be able to hear the babies heart beat. This can vary by days or even by a week or so, as well as how "high-tech" the device is. So don't be alarmed if you dont hear it on the first day of week 12!


What month can you hear the baby's heartbeat?

The babies heart beat develops at the fifth week of pregnancy. By the 12th week of pregnancy, you may be able to hear the babies heart beat. This can vary by days or even by a week or so, as well as how "high-tech" the device is. So don't be alarmed if you dont hear it on the first day of week 12!


Where can one find pregnancy week by week pictures?

Week by week pregnancy pictures can be found in books retrieved from the library. There are websites online like Babycenter, Thebump, and 3Dpregnancy that have photos available of week by week pregnancy.


Where can I find a week by week pregnancy calendar?

One can find a week by week pregnancy calender from many places. Some of the best sites where one can easily find pregnancy calender are kids health,3d pregnancy and many more.


How quickly can you know if you are pregnant?

The earliest detecting test is one by 'First Response' which is approx 5 days before your missed period. Usually pregnancy symptoms vary but will usually arise in week 6 of pregnancy.


Where can I find a chart for pregnancy week by week?

If you go to a website such as babycenter dot com, you will be able to find a chart that explains pregnancy week by week.


When is the perfect time to use the pregnancy test?

Individual tests will vary on this one, but most encourage 5 days to a week after the start date of your expected period.


Where can I find information on pregnancy week by week?

Babycenter's website has a very detailed information chart on how a fetus develops week-by-week during a pregnancy. The site also has an information chart on how twins develop during pregnancy.