Pregnancy week by week



Week 1 of Pregnancy

Week one of pregnancy begins with the first day of your period. If you have a 28 day cycle, ovulation will occur around 14 days after the start of your period. However, this may vary depending on how regular your cycles are. In this first week, your uterus is preparing for potential pregnancy, as it does every month throughout your reproductive cycle. The lining of your uterus is shed during the days you bleed, and when the bleeding stops the lining is rebuilt. Meanwhile, an ovum or egg starts to mature at about day five of your cycle in one of the two ovaries, and it keeps growing till ovulation occurs in mid-cycle.

Pregnancy is dated from the first day of your last period. Even though you haven’t ovulated or conceived yet, this week is considered to be the first week of your pregnancy. This means that by the time you miss your period, your baby is just two weeks old. But because pregnancy is dated from the first day of your last period, you are considered four weeks pregnant. You can work out the due date by adding nine months and seven days to the first day of your last period. It is important to remember that your due date is only an estimate as only 5% of women actually deliver on their due date. Most babies are born anytime between 38 to 42 weeks of pregnancy.

Your body

This week your body is going through the same process it goes every month when you are having your periods. If you are planning to conceive, you should ideally visit your doctor. This is the time to discuss your current medications (if you are taking any) with your doctor and how it might affect your pregnancy. Your doctor may suggest some basic blood tests as part of your pre-pregnancy check up. This is important because any medical condition that has gone unnoticed so far can have an adverse effect on your pregnancy. It is important that you discuss with your doctor any problems you experienced in your previous pregnancies and medical histories on both sides of your family.


If you are trying to conceive, now is a good time to start eating a healthy diet (if you haven’t started yet). Eat plenty of fresh fruits and vegetables, exercise and start taking folic acid supplements if you haven’t already. Be extra cautious while using over-the-counter medicines and stop smoking or drinking alcohol if you do. Refer to our section on pregnancy diet to learn more about what you should be eating.



1) When will I start to notice pregnancy signs and symptoms?

The symptoms of pregnancy are due to hormonal changes in your body which affect every woman differently. Some women may notice changes within a couple of weeks and some may not feel anything for months. Also, the earliest signs of pregnancy closely resemble your PMS symptoms, which may make it hard to tell whether you have conceived or not.

If you are trying to conceive, few things to look out for are any signs of morning sickness, excessive tiredness, tender breasts, or frequent urination. Refer to our section on sign & symptoms of first trimester to learn more.


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