Pregnancy Week 5

Woman who is 5 weeks pregnant

5 Weeks Pregnant: The 5th Week of Pregnancy

Congratulations! Weeks four through seven are when most women discover they are pregnant. This week-by-week newsletter will keep you informed about what to expect for you and your developing baby during your pregnancy. If you have just found out that you are pregnant, you may want to begin by reading weeks 1 through 4.

Pregnancy Week 5: How is pregnancy calculated?

There is always a lot of confusion when discussing the way in which pregnancy is calculated. Since most women do not know when they conceived, pregnancy is always determined from the first day of your last menstrual period (LMP). Given that this is the way pregnancy is calculated, your pregnancy will last around 40 weeks. For more information on how pregnancy is measured, please see our information on calculating your dates.

Pregnancy Week 5: What changes are occurring with your body?

There are still not any changes noticeable to those around you at this time. You may begin to notice more pregnancy symptoms such as morning sickness. About 50% of pregnant women will experience morning sickness.

Morning sickness normally begins around the 6th week of pregnancy, but it is not too soon to begin preparing for how you will deal with it. Morning sickness can be experienced in the morning, throughout the day, or in the evening. For ways to help deal with the nausea that accompanies early pregnancy, read our tips for surviving morning sickness.

If morning sickness is so severe that you are constantly throwing up and not keeping anything down, consult with your doctor about the possibility of having hyperemesis gravidarum.*

Pregnancy Week 5: What is happening with your baby?

Your baby looks more like a tadpole than a baby at this point. Your baby’s heart is beating at a steady rhythm, and the structures that will become the eyes and ears are forming. Your baby’s skeleton is also beginning to form.*

Pregnancy Week 5: How big is your baby?

Your baby is still very small, measuring 0.118 inches (3 millimeters) long. At this point your baby’s length is measured from the crown of their head to the bottom of their rear end (CRL). The CRL measurement is used until 20 weeks gestation, at which point it will change to measuring from crown to heel (CHL).*

Pregnancy Week 5: What should you plan for this week?

If you still have not arranged an appointment for your first prenatal visit, then you should go ahead and do so. If you are still interviewing doctors/midwives, you would want to begin narrowing it down and choosing your provider.

Pregnancy Week 5: Tips for making your pregnancy better

You may be wondering how much weight you should expect to gain. The American College of Obstetricians and Gynecologists (ACOG) recommends a weight gain of 25 to 35 pounds (11.3 to 15.9 kilograms) during pregnancy for women who are at normal weight when pregnancy occurs. Underweight women should gain about 34 pounds (15.4 kilograms), while overweight women should gain about 20 pounds (9 kilograms). For more information see about pregnancy weight gain.

Pregnancy Week 5: Tips for mom’s partner

Try helping out with household tasks without being asked. This could be as simple as vacuuming, taking out the trash, or washing the dishes.

Last Updated: 1/2013