It is important to track a pregnancy from the first week sign of pregnant itself, if you know you are pregnant. A natural process that involves changes in a woman's body, pregnancies in a large many women are uncomplicated and do not affect their daily routine until the last weeks before delivery. Pregnancy typically lasts 40 weeks or, 9 months; the phase is divided into three periods called trimesters (three-month intervals). During this period, different things happen to the growing baby-it makes sense to know what they are and learning to identify and keep in memory the changes experienced or witnessed. That is why early symptoms during the first week itself are given importance of late.

Biological Changes

Why is the first week sign of pregnancy considered important? This is because pregnancy is counted from the first day of a woman's last period. What this means is that at conception, the unborn child is already considered two weeks old! Calculating when your baby begins to develop, you come to know that the development of pregnancy is counted from the first day of the woman's last normal menstrual period (LMP), even though the development of the fetus does not begin until conception, which is about two weeks later. Calculating from the LMP also gives a standard of measurement for healthcare providers to follow, because they find it difficult to track when exactly conception occurred.

The phase of menstruation is the most opportune time to ovulate. Ovulation occurs when a mature egg is released from the ovary, pushed down the fallopian tube, and is available to be fertilized; it is the lining of the uterus that has thickened now to prepare for a fertilized egg. During this time a few changes follow in your growing body and these are observable during the first week of pregnancy itself. Some of these changes described here may happen earlier or later than they appear on this list, and some of them may continue throughout the pregnancy.

While we are discussing the first week of pregnancy, many of these changes do come into notice after the pregnancy is already more than a week old. Because the changes in the week one phase are usually so subtle and indefinable, they are discussed along with other changes happening in other weeks.

Other Changes

From week one onwards, your period stops or becomes very light. Nausea or queasiness or morning sickness begins to show sign of playing havoc with your system, so during this phase it helps to counter it with regular small meals taken throughout the day-such as crackers on toast, juice etc. Another sign is your breasts swelling and becoming tender. Your nipples and the area around the nipples (areola) too experience darkness and become broader. The need to urinate is felt more often as is the need to rest, because you are tired. Constipation might occur, as might heartburn, and headaches are a normal thing to endure during early preganancy. Proneness to mood swings is another emotional angle you have to consider. This is the time when you undertake a visit to your healthcare provider, if the symptoms are readily observeable and sensed, and when you should take yourself off any addictive substances. The first week sign of pregnancy is a signal to change an unhealthy lifestyle.