Do you think you are 1 week pregnant? Surprise! Although there are plenty of things already going on with your body, it is highly unlikely you even know you are 1 week pregnant because actually you are not pregnant at all.
At week 1, there is no baby or even an embryo in sight. Just a beautiful egg (the largest cells in the body) and millions of anxious sperm waiting in the starting line. Even though you haven’t actually conceived yet, most obstetricians count pregnancy starting from the first day of your last period. Therefore in this week, you are on your period and not yet pregnant.
It is important to remember the date of the first day of your last period because your pregnancy will be calculated from this date.
How Many Months is 1 week pregnant?
There are 40 weeks in a pregnancy, starting from the first day of your last menstrual period. If you are 1 week pregnant, you are in month 1 of your pregnancy. Only 8 months more to go!
If you have more questions and want to know more about weeks, trimesters, months and due date during pregnancy you can visit our post about how to calculate pregnancy.
Your baby at 1 week pregnant
Baby? What baby? Even though you are technically in the first week of pregnancy, there is no baby yet. As mentioned before, obstetricians date the beginning of “pregnancy” from about two weeks before the sperm penetrates the egg.

Your body at 1 week pregnant
Although, as mentioned above, there is no baby yet, your uterus has begun preparing for ovulation and the arrival of a fertilized egg. At around day five after your period started, an egg will begin to mature inside a follicle in one of your two ovaries. In addition, the lining of your womb will also start to thicken in preparation for the implanting of the fertilized egg. Although you won’t know for sure if that egg has successfully been fertilized with sperm until next month.
If you are thinking in getting pregnant, it’s a good idea to start at a healthy weight and free of bad habits such as smoking, drinking alcohol or too much caffeine.
It is algo a good idea to ask your your physician about recommendations for prenatal vitamins and other supplements before trying to conceive. Typically, this consists of folic acid supplementation, which is known to help reduce the risk of birth defects of your baby’s brain and spinal cord.
You may also consider talking to your physician about any medical conditions you have and how they could affect your pregnancy, including diabetes, high blood pressure, asthma, depression, thyroid conditions, epilepsy or obesity.
1 week pregnant symptoms
At 1 week pregnant you will be experiencing all those typical symptoms to your period because, as mentioned above, you are not actually pregnant. These symptoms may last from three to seven days, and can include:
- Vaginal bleeding
- Lower back pain and cramps
- Mood swings
- Headache
- Bloating
Find out what to expect next week or any other week!