Pregnancy is a scary, yet miraculous part of life. Part of the nervousness and anticipation that surrounds pregnancy is a lack of knowledge about what happens to your body during the nine months required to create a new life. Below is a pregnancy week by week list of the changes that will take place while you are pregnant. Remember that every woman is different and the rate at which a fetus develops is varied.Most of the pregnancy calendars or guides chart baby's growth during pregnancy week by week. Though the baby continues to grow with every passing day, but changes and development of baby usually becomes manifest over a week's time. Therefore, the complete pregnancy period has been divided into three trimesters comprising 40 weeks.

As you know what's happening to you and your baby during the different stage of pregnancy, you become more confident in facing the sudden problems that surface during this time. There are many issues to deal with such as ultrasound of different stages to ensure your baby is developing properly, prenatal checkups, the use of weekly pregnancy calendar, and others.There is a definite technique that you can use to calculate this calendar. The beginning of this calendar is the date of your last period. This is the same date used by doctors to predict the date of your delivery or your 'due date', which is about 40 weeks from your last period. It may be one or two weeks more or less than the actual date for different women. Every mom-to-be is anxious to know the exact day when her baby will be born. Therefore, this weekly calendar becomes all the more important.

Ovulation should occur some time around the third week, after which conception can take place. One of the first pregnancy symptoms may be implantation bleeding, which can happen when the fertilized egg implants itself into the wall of the uterus. This bleeding should be very light, and perhaps pink in color.Thirteenth week onwards, pregnancy enters into the second trimester and there are further developments in pregnancy week by week. Baby further develops and gradually, vocal chords begin to form, the nervous system starts to function and the reproductive organs become fully developed. Baby's hair, eyelids, eyebrows, eyelashes, nails, fingers and toes also get formed.

First time pregnancies are normally given one or two weeks before and after the expected delivery date, because pregnancies are different among different women; so you cannot accurately or 100% predict dates. Tracking changes in the pregnancy week by week is also beneficial, especially to all mothers excited to see their little ones get born.Above all, even if you are experiencing pregnancy morning sickness symptoms, embrace pregnancy week 4 as a critical plus wonderful stage in the development of both your unborn child, plus yourself!

Author's Bio: 

Read about pregnancy week by week and also read about pregnancy week 1 and pregnancy week 2