13 Weeks
13 Weeks size comparison
Baby is the size of a
Baby at 13 weeks in womb

Baby this Week

  • Organs begin to function.
  • The pancreas is producing insulin and the kidneys are producing urine.

How Big is Baby?

Baby is 2.91 inches long (7.4 cm)
(Measured from crown to rump)
Baby weighs 0.81oz (23 grams)
*Metrics above are estimates of baby at 13 weeks
Layout Belly
13 Weeks pregnant illustration

Your Developments

  • 2.3 - 3.5 lb (1 to 1.5kg) weight gain over the past month. On average 10 1/2 oz (300 gms) a week.
  • Possible increase in perspiration.
  • Gum problems may result from an increase in blood flow.

Pregnancy To Do's

  • Visit your dentist now as chances for dental problems increase during pregnancy.
  • Remember to tell your dentist you are pregnant.
13 Week old baby in womb