Pregnancy Week 1 & 2

Congratulations! During these first two weeks, your body is preparing for possible conception.

Pregnancy Week 1 & 2: How is pregnancy calculated?

Calculating the day your baby begins to develop and keeping track of your pregnancy dates can be a challenge. 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. Pregnancy is calculated from this day because each time a woman has a period, her body is preparing for pregnancy. Counting from the LMP, most women are pregnant an average of 280 days. Calculating from the LMP also gives a standard of measurement for health care providers to follow since it is extremely difficult to know exactly when conception occurred. For more information on how pregnancy is measured, please see our information on calculating your dates.

Pregnancy Week 1 & 2: What changes are occurring with your body?

Your period has just begun, and you may be thinking about becoming pregnant. Your ovulation time is the most important thing you need to understand when trying to conceive. Ovulation occurs when a mature egg is released from the ovary, pushed down the fallopian tube and is available to be fertilized. The lining of the uterus has thickened to prepare for a fertilized egg. If conception does not occur, the uterine lining will be shed. The shedding of an unfertilized egg and the uterine wall is the time of menstruation.

There are also several facts that you need to know concerning ovulation:

  • An egg lives 12-24 hours after leaving the ovary.
  • Normally, only one egg is released each time of ovulation.
  • Ovulation can be affected by stress, illness, or disruption of normal routines.
  • Some women may experience some light spotting during ovulation.

Pregnancy Week 1 & 2: What is happening with your baby?

Nothing is happening yet, but be patient while the stage is being set.

Pregnancy Week 1 & 2: How do you track ovulation?

A woman’s monthly cycle is measured from the first day of her menstrual period until the first day of her next period. On average, a woman’s cycle normally is between 28-32 days. Ovulation is calculated by starting with the first day of the cycle, which is the day the menstrual period starts. Most women ovulate anywhere between Day 11 – Day 21 of their cycle. This is what many refer to as the “fertile time” or “fertility window” of a woman’s cycle, because sexual intercourse during this time increases the chance of pregnancy.

For more information on tracking ovulation please see fertility awareness, ovulation kits and fertility monitors, ovulation calendar, and/or ovulation calculator.

Pregnancy Week 1 & 2: What should you plan at this time?

There may need to be some lifestyle changes made at this time to increase your chances of conceiving and having a healthy baby down the road. Adequate exercise and a balanced diet are important factors to evaluate. You would want to begin prenatal vitamins and remove things such as:

  • Caffeine
  • Artificial sweeteners
  • Alcohol
  • Recreational drugs
  • Nicotine

If you are taking prescription drugs you need to check with your health care provider to see if these are safe to use during pregnancy. For more information on nutrition during your pregnancy, please see our information on on pre-conception nutrition.

Pregnancy Week 1 & 2: Tips for making your pregnancy better

The most important thing you can do right now is to act in the way you would if you already knew you were pregnant. Since it can be weeks before you know if conception has occurred, this will protect both you and your future baby from any substances or activities that could cause problems.

Pregnancy Week 1 & 2: Tips for mom’s partner

Many times the male partner does not feel that he has any role at this time. However, your health and lifestyle can also affect your future baby. You may need to evaluate your nutrition, medication intake, and habits such as smoking, using alcohol, or any type of drugs. Men can also benefit from taking prenatal vitamins or another type of vitamin supplement during the preconception time.

Last Updated: 01/2013