If you are 5 weeks pregnant, baby is now called an embryo at this stage and is slightly bigger than the sesame seed. Fetal age is approximately 3weeks.

Baby is slowly transforming into a bundle of cells organized in a “C” shape with a top, bottom, front, and back, which will seal and develop into the neural tube (this becomes the spinal cord later).

The neural tube already has a wider, flatter top that will develop into baby’s brain. A bulge has developed in the center of the embryo, which will soon become a tiny U-shaped tube which will form the heart. This tub will start beating between days 21-24, and is circulating the embryo’s own blood.

Around days 26, arm buds will begin to form, looking like knobs on the side of the body. This little embryo is surrounded by protective membranes and attached to a yolk sac that makes the embryo’s unique cells.

You on the other hand, your body is producing large amounts of hormones, and will continue to do so for the next 6 weeks as your pregnancy week by week grows.

The hormones produced will;

  • Keep your uterus from shedding the embryo as it naturally would during your monthly cycle.
  • Stimulate milk production from your breasts.
  • Widen your blood vessels and bring more blood to the baby and less to your brain-making you feel dizzy.
  • Make your digestion more efficient by slowing down your metabolism.
  • Sharpen your sense of smell
  • Cause your mood swings by affecting your brain chemistry.
  • Make the ligaments in your hips to soften in preparation for carrying the baby and birth.

At this point, 5 weeks pregnant mom is probably feeling emotionally excited and happy if you were looking forward to being pregnant. You might also be moody and emotional due to the flood of pregnancy hormones.

These first month pregnancy symptoms might also include a feeling of forgetfulness? Like where did you leave your keys? Or did you remember to put the lid on top of the rice cooker? Don’t be alarmed if this happens, because it comes as a result of less blood flow to your brain.

Physically, you are tired because your body is spending a lot of energy adjusting to pregnancy. And you might be bloated and crampy in the pelvis.

Disgusted by smoke, alcohol, odors or caffeinated beverages yet? Maybe and maybe not, just avoid being near anything that disgusts you. These are your baby’s protective mechanisms kicking in.

If you are nauseated by now, just keep your stomach lined with small health meals. Continue to practice the healthy habits as discussed in pregnancy week 1.


Visit the homepage of Signs of pregnancy week by week here

See Pregnancy week by week with this link here

Pregnancy week 1 link here

Pregnancy week 2 link here

3 weeks pregnant link here

4 weeks pregnant link here

Return to the top of this page 5 weeks pregnant information here

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